diff --git a/adb_install.cpp b/adb_install.cpp
index 77b9a8c..3e53066 100644
--- a/adb_install.cpp
+++ b/adb_install.cpp
@@ -84,7 +84,7 @@
 #define ADB_INSTALL_TIMEOUT 300
 
 int
-apply_from_adb(const char* install_file) {
+apply_from_adb(const char* install_file, pid_t* child_pid) {
 
     stop_adbd();
     set_usb_driver(true);
@@ -98,16 +98,14 @@
         _exit(-1);
     }
 
-	char child_prop[PROPERTY_VALUE_MAX];
-	sprintf(child_prop, "%i", child);
-	property_set("tw_child_pid", child_prop);
+    *child_pid = child;
+    // caller can now kill the child thread from another thread
 
     // FUSE_SIDELOAD_HOST_PATHNAME will start to exist once the host
     // connects and starts serving a package.  Poll for its
     // appearance.  (Note that inotify doesn't work with FUSE.)
     int result;
     int status;
-    int wipe_cache;
     bool waited = false;
     struct stat st;
     for (int i = 0; i < ADB_INSTALL_TIMEOUT; ++i) {
@@ -122,20 +120,21 @@
                 sleep(1);
                 continue;
             } else {
-                printf("\nTimed out waiting for package.\n\n", strerror(errno));
+                printf("\nTimed out waiting for package: %s\n\n", strerror(errno));
                 result = -1;
                 kill(child, SIGKILL);
                 break;
             }
         }
-        property_set("tw_sideload_file", FUSE_SIDELOAD_HOST_PATHNAME);
         // Install is handled elsewhere in TWRP
-        result = 5; //install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false);
-        break;
+        //install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false);
+	return 0;
     }
 
-    // We do this elsewhere in TWRP
-    /*if (!waited) {
+    // if we got here, something failed
+    *child_pid = 0;
+
+    if (!waited) {
         // Calling stat() on this magic filename signals the minadbd
         // subprocess to shut down.
         stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);
@@ -145,26 +144,19 @@
         // you just have to 'adb sideload' a file that's not a valid
         // package, like "/dev/null".
         waitpid(child, &status, 0);
-    }*/
+    }
 
-    if (result != 5) {
-        stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);
-        waitpid(child, &status, 0);
-        result = -1;
-        if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-            if (WEXITSTATUS(status) == 3) {
-                printf("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
-                result = -2;
-            } else if (!WIFSIGNALED(status)) {
-                printf("status %d\n", WEXITSTATUS(status));
-            }
+    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+        if (WEXITSTATUS(status) == 3) {
+            printf("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
+            result = -2;
+        } else if (!WIFSIGNALED(status)) {
+            printf("status %d\n", WEXITSTATUS(status));
         }
-	    set_usb_driver(false);
-	    maybe_restart_adbd();
-	    return result;
-	} else {
-        return 0;
-	}
+    }
 
-	return -1; // This should not happen
+    set_usb_driver(false);
+    maybe_restart_adbd();
+
+    return result;
 }
diff --git a/adb_install.h b/adb_install.h
index 604c61d..24e9e21 100644
--- a/adb_install.h
+++ b/adb_install.h
@@ -21,6 +21,6 @@
 
 void set_usb_driver(bool enabled);
 void maybe_restart_adbd();
-int apply_from_adb(const char* install_file);
+int apply_from_adb(const char* install_file, pid_t* child_pid);
 
 #endif
diff --git a/gui/action.cpp b/gui/action.cpp
index 4796ff3..361a676 100644
--- a/gui/action.cpp
+++ b/gui/action.cpp
@@ -41,6 +41,7 @@
 #include "../openrecoveryscript.hpp"
 
 #include "../adb_install.h"
+#include "../fuse_sideload.h"
 #ifndef TW_NO_SCREEN_TIMEOUT
 #include "blanktimer.hpp"
 #endif
@@ -68,6 +69,7 @@
 static string zip_queue[10];
 static int zip_queue_index;
 static pthread_t terminal_command;
+pid_t sideload_child_pid;
 
 GUIAction::GUIAction(xml_node<>* node)
 	: GUIObject(node)
@@ -833,6 +835,26 @@
 	return 0;
 }
 
+void GUIAction::reinject_after_flash()
+{
+	if (DataManager::GetIntValue(TW_HAS_INJECTTWRP) == 1 && DataManager::GetIntValue(TW_INJECT_AFTER_ZIP) == 1) {
+		operation_start("ReinjectTWRP");
+		gui_print("Injecting TWRP into boot image...\n");
+		if (simulate) {
+			simulate_progress_bar();
+		} else {
+			TWPartition* Boot = PartitionManager.Find_Partition_By_Path("/boot");
+			if (Boot == NULL || Boot->Current_File_System != "emmc")
+				TWFunc::Exec_Cmd("injecttwrp --dump /tmp/backup_recovery_ramdisk.img /tmp/injected_boot.img --flash");
+			else {
+				string injectcmd = "injecttwrp --dump /tmp/backup_recovery_ramdisk.img /tmp/injected_boot.img --flash bd=" + Boot->Actual_Block_Device;
+				TWFunc::Exec_Cmd(injectcmd);
+			}
+			gui_print("TWRP injection complete.\n");
+		}
+	}
+}
+
 int GUIAction::flash(std::string arg)
 {
 	int i, ret_val = 0, wipe_cache = 0;
@@ -856,22 +878,7 @@
 	if (wipe_cache)
 		PartitionManager.Wipe_By_Path("/cache");
 
-	if (DataManager::GetIntValue(TW_HAS_INJECTTWRP) == 1 && DataManager::GetIntValue(TW_INJECT_AFTER_ZIP) == 1) {
-		operation_start("ReinjectTWRP");
-		gui_print("Injecting TWRP into boot image...\n");
-		if (simulate) {
-			simulate_progress_bar();
-		} else {
-			TWPartition* Boot = PartitionManager.Find_Partition_By_Path("/boot");
-			if (Boot == NULL || Boot->Current_File_System != "emmc")
-				TWFunc::Exec_Cmd("injecttwrp --dump /tmp/backup_recovery_ramdisk.img /tmp/injected_boot.img --flash");
-			else {
-				string injectcmd = "injecttwrp --dump /tmp/backup_recovery_ramdisk.img /tmp/injected_boot.img --flash bd=" + Boot->Actual_Block_Device;
-				TWFunc::Exec_Cmd(injectcmd);
-			}
-			gui_print("TWRP injection complete.\n");
-		}
-	}
+	reinject_after_flash();
 	PartitionManager.Update_System_Details();
 	operation_end(ret_val);
 	return 0;
@@ -1283,92 +1290,90 @@
 	return 0;
 }
 
-int GUIAction::adbsideload(std::string arg)
+void* GUIAction::sideload_thread_fn(void *cookie)
 {
-	int ret = 0;
+	gui_print("Starting ADB sideload feature...\n");
+	bool mtp_was_enabled = TWFunc::Toggle_MTP(false);
+	GUIAction* this_ = (GUIAction*) cookie;
 
-	operation_start("Sideload");
-	if (simulate) {
-		simulate_progress_bar();
+	// wait for the adb connection
+	int ret = apply_from_adb("/", &sideload_child_pid);
+	DataManager::SetValue("tw_has_cancel", 0); // Remove cancel button from gui now that the zip install is going to start
+
+	if (ret != 0) {
+		if (ret == -2)
+			gui_print("You need adb 1.0.32 or newer to sideload to this device.\n");
+		ret = 1; // failure
 	} else {
 		int wipe_cache = 0;
 		int wipe_dalvik = 0;
-
-		gui_print("Starting ADB sideload feature...\n");
-		bool mtp_was_enabled = TWFunc::Toggle_MTP(false);
 		DataManager::GetValue("tw_wipe_dalvik", wipe_dalvik);
-		ret = apply_from_adb("/");
-		DataManager::SetValue("tw_has_cancel", 0); // Remove cancel button from gui now that the zip install is going to start
-		char file_prop[PROPERTY_VALUE_MAX];
-		property_get("tw_sideload_file", file_prop, "error");
-		if (ret != 0) {
-			ret = 1; // failure
-			if (ret == -2)
-				gui_print("You need adb 1.0.32 or newer to sideload to this device.\n");
+
+		if (TWinstall_zip(FUSE_SIDELOAD_HOST_PATHNAME, &wipe_cache) == 0) {
+			if (wipe_cache || DataManager::GetIntValue("tw_wipe_cache"))
+				PartitionManager.Wipe_By_Path("/cache");
+			if (wipe_dalvik)
+				PartitionManager.Wipe_Dalvik_Cache();
 		} else {
-			if (TWinstall_zip(file_prop, &wipe_cache) == 0) {
-				if (wipe_cache || DataManager::GetIntValue("tw_wipe_cache"))
-					PartitionManager.Wipe_By_Path("/cache");
-				if (wipe_dalvik)
-					PartitionManager.Wipe_Dalvik_Cache();
-			} else {
-				ret = 1; // failure
-			}
-			set_usb_driver(false);
-			maybe_restart_adbd();
-		}
-		TWFunc::Toggle_MTP(mtp_was_enabled);
-		if (strcmp(file_prop, "error") != 0) {
-			struct stat st;
-			stat("/sideload/exit", &st);
-			int child_pid, status;
-			char child_prop[PROPERTY_VALUE_MAX];
-			property_get("tw_child_pid", child_prop, "error");
-			if (strcmp(child_prop, "error") == 0) {
-				LOGERR("Unable to get child ID from prop\n");
-			} else {
-				child_pid = atoi(child_prop);
-				LOGINFO("Waiting for child sideload process to exit.\n");
-				waitpid(child_pid, &status, 0);
-			}
-		}
-		if (DataManager::GetIntValue(TW_HAS_INJECTTWRP) == 1 && DataManager::GetIntValue(TW_INJECT_AFTER_ZIP) == 1) {
-			operation_start("ReinjectTWRP");
-			gui_print("Injecting TWRP into boot image...\n");
-			if (simulate) {
-				simulate_progress_bar();
-			} else {
-				TWPartition* Boot = PartitionManager.Find_Partition_By_Path("/boot");
-				if (Boot == NULL || Boot->Current_File_System != "emmc")
-					TWFunc::Exec_Cmd("injecttwrp --dump /tmp/backup_recovery_ramdisk.img /tmp/injected_boot.img --flash");
-				else {
-					string injectcmd = "injecttwrp --dump /tmp/backup_recovery_ramdisk.img /tmp/injected_boot.img --flash bd=" + Boot->Actual_Block_Device;
-					TWFunc::Exec_Cmd(injectcmd);
-				}
-				gui_print("TWRP injection complete.\n");
-			}
+			ret = 1; // failure
 		}
 	}
-	operation_end(ret);
+	if (sideload_child_pid) {
+		LOGINFO("Signaling child sideload process to exit.\n");
+		struct stat st;
+		// Calling stat() on this magic filename signals the minadbd
+		// subprocess to shut down.
+		stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);
+		int status;
+		LOGINFO("Waiting for child sideload process to exit.\n");
+		waitpid(sideload_child_pid, &status, 0);
+	}
+
+	TWFunc::Toggle_MTP(mtp_was_enabled);
+	this_->reinject_after_flash();
+	this_->operation_end(ret);
+	return NULL;
+}
+
+int GUIAction::adbsideload(std::string arg)
+{
+	operation_start("Sideload");
+	if (simulate) {
+		simulate_progress_bar();
+		operation_end(0);
+	} else {
+		// we need to start a thread to allow the operation to be cancelable
+		pthread_t sideload_thread;
+		int rc = pthread_create(&sideload_thread, NULL, sideload_thread_fn, this);
+		if (rc != 0) {
+			LOGERR("Error starting sideload thread, rc=%i.\n", rc);
+			operation_end(1);
+		}
+	}
 	return 0;
 }
 
 int GUIAction::adbsideloadcancel(std::string arg)
 {
-	int child_pid;
-	char child_prop[PROPERTY_VALUE_MAX];
 	struct stat st;
 	DataManager::SetValue("tw_has_cancel", 0); // Remove cancel button from gui
 	gui_print("Cancelling ADB sideload...\n");
-	stat("/sideload/exit", &st);
-	::sleep(1);
-	property_get("tw_child_pid", child_prop, "error");
-	if (strcmp(child_prop, "error") == 0) {
-		LOGERR("Unable to get child ID from prop\n");
+	LOGINFO("Signaling child sideload process to exit.\n");
+	// Calling stat() on this magic filename signals the minadbd
+	// subprocess to shut down.
+	stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);
+	if (!sideload_child_pid) {
+		LOGERR("Unable to get child ID\n");
 		return 0;
 	}
-	child_pid = atoi(child_prop);
-	kill(child_pid, SIGTERM);
+	::sleep(1);
+	LOGINFO("Killing child sideload process.\n");
+	kill(sideload_child_pid, SIGTERM);
+	int status;
+	LOGINFO("Waiting for child sideload process to exit.\n");
+	waitpid(sideload_child_pid, &status, 0);
+	sideload_child_pid = 0;
+	operation_end(1);
 	DataManager::SetValue("tw_page_done", "1"); // For OpenRecoveryScript support
 	return 0;
 }
diff --git a/gui/objects.hpp b/gui/objects.hpp
index 3f12ea7..bf07c86 100644
--- a/gui/objects.hpp
+++ b/gui/objects.hpp
@@ -283,9 +283,11 @@
 	int doAction(Action action);
 	void simulate_progress_bar(void);
 	int flash_zip(std::string filename, std::string pageName, int* wipe_cache);
+	void reinject_after_flash();
 	void operation_start(const string operation_name);
 	void operation_end(const int operation_status);
 	static void* command_thread(void *cookie);
+	static void* sideload_thread_fn(void *cookie);
 	time_t Start;
 
 	// map action name to function pointer
diff --git a/openrecoveryscript.cpp b/openrecoveryscript.cpp
index 0b71a42..0db55cd 100644
--- a/openrecoveryscript.cpp
+++ b/openrecoveryscript.cpp
@@ -356,7 +356,8 @@
 					gui_print("Starting ADB sideload feature...\n");
 					DataManager::SetValue("tw_has_cancel", 1);
 					DataManager::SetValue("tw_cancel_action", "adbsideloadcancel");
-					ret_val = apply_from_adb(Sideload_File.c_str());
+					pid_t child_pid;
+					ret_val = apply_from_adb(Sideload_File.c_str(), &child_pid);
 					DataManager::SetValue("tw_has_cancel", 0);
 					if (ret_val != 0)
 						ret_val = 1; // failure
diff --git a/twrp.cpp b/twrp.cpp
index e0b3359..35404c3 100644
--- a/twrp.cpp
+++ b/twrp.cpp
@@ -77,6 +77,7 @@
 
 	// Handle ADB sideload
 	if (argc == 3 && strcmp(argv[1], "--adbd") == 0) {
+		property_set("ctl.stop", "adbd");
 		adb_main(argv[2]);
 		return 0;
 	}
@@ -95,7 +96,7 @@
 	property_set("ro.twrp.version", TW_VERSION_STR);
 
 	time_t StartupTime = time(NULL);
-	printf("Starting TWRP %s on %s (pid %d)", TW_VERSION_STR, ctime(&StartupTime), getpid());
+	printf("Starting TWRP %s on %s (pid %d)\n", TW_VERSION_STR, ctime(&StartupTime), getpid());
 
 	// Load default values to set DataManager constants and handle ifdefs
 	DataManager::SetDefaultValues();