diff --git a/src/platforms/posix/px4_layer/px4_posix_tasks.cpp b/src/platforms/posix/px4_layer/px4_posix_tasks.cpp
index 54fc555e0b..c831ae04dd 100644
--- a/src/platforms/posix/px4_layer/px4_posix_tasks.cpp
+++ b/src/platforms/posix/px4_layer/px4_posix_tasks.cpp
@@ -237,17 +237,6 @@ void px4_task_exit(int ret)
 	pthread_exit((void *)(unsigned long)ret);
 }
 
-void px4_killall(void)
-{
-	//printf("Called px4_killall\n");
-	for (int i=0; i<PX4_MAX_TASKS; ++i) {
-		// FIXME - precludes pthread task to have an ID of 0
-		if (taskmap[i].isused == true) {
-			px4_task_delete(i);
-		}
-	}
-}
-
 int px4_task_kill(px4_task_t id, int sig)
 {
 	int rv = 0;
diff --git a/src/platforms/px4_tasks.h b/src/platforms/px4_tasks.h
index d03f17b85d..e7eda424bf 100644
--- a/src/platforms/px4_tasks.h
+++ b/src/platforms/px4_tasks.h
@@ -91,9 +91,6 @@ __BEGIN_DECLS
 /** Reboots the board */
 __EXPORT void px4_systemreset(bool to_bootloader) noreturn_function;
 
-/** Sends SIGUSR1 to all processes */
-__EXPORT void px4_killall(void);
-
 /** Starts a task and performs any specific accounting, scheduler setup, etc. */
 __EXPORT px4_task_t px4_task_spawn_cmd(const char *name,
 			int priority,
diff --git a/src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp b/src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp
index 94d52be945..b4554bf4fe 100644
--- a/src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp
+++ b/src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp
@@ -169,17 +169,6 @@ void px4_task_exit(int ret)
 	// Free stack
 }
 
-void px4_killall(void)
-{
-	//printf("Called px4_killall\n");
-	for (int i=0; i<PX4_MAX_TASKS; ++i) {
-		// FIXME - precludes pthread task to have an ID of 0
-		if (taskmap[i].isused == true) {
-			px4_task_delete(i);
-		}
-	}
-}
-
 int px4_task_kill(px4_task_t id, int sig)
 {
 	printf("Called px4_task_kill\n");