diff --git a/minui/events.cpp b/minui/events.cpp
index fa44033..0e1fd44 100644
--- a/minui/events.cpp
+++ b/minui/events.cpp
@@ -24,6 +24,8 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 
+#include <functional>
+
 #include "minui/minui.h"
 
 #define MAX_DEVICES 16
diff --git a/ui.cpp b/ui.cpp
index 3ecd6d1..a796461 100644
--- a/ui.cpp
+++ b/ui.cpp
@@ -30,6 +30,7 @@
 #include <time.h>
 #include <unistd.h>
 
+#include <functional>
 #include <string>
 
 #include <android-base/file.h>