diff --git a/src/system/libroot/os/thread.c b/src/system/libroot/os/thread.c
index 0e2c0032d6..fc014204f5 100644
--- a/src/system/libroot/os/thread.c
+++ b/src/system/libroot/os/thread.c
@@ -28,6 +28,7 @@ typedef struct callback_node {
 
 
 void _thread_do_exit_work(void);
+void _thread_do_exit_notification(void);
 
 
 static status_t