diff --git a/roots.cpp b/roots.cpp
index 47cea0b..28004a7 100644
--- a/roots.cpp
+++ b/roots.cpp
@@ -238,10 +238,16 @@
 
         if (strcmp(v->mount_point, "/tmp") == 0 ||
             strcmp(v->mount_point, "/cache") == 0) {
-            if (ensure_path_mounted(v->mount_point) != 0) return -1;
+            if (ensure_path_mounted(v->mount_point) != 0) {
+                LOGE("failed to mount %s\n", v->mount_point);
+                return -1;
+            }
 
         } else {
-            if (ensure_path_unmounted(v->mount_point) != 0) return -1;
+            if (ensure_path_unmounted(v->mount_point) != 0) {
+                LOGE("failed to unmount %s\n", v->mount_point);
+                return -1;
+            }
         }
     }
     return 0;