diff --git a/src/core/hle/kernel/thread.h b/src/core/hle/kernel/thread.h
index a89fd6265..5f404093f 100644
--- a/src/core/hle/kernel/thread.h
+++ b/src/core/hle/kernel/thread.h
@@ -135,9 +135,6 @@ void WaitCurrentThread(WaitType wait_type, Object* wait_object = GetCurrentThrea
  */
 void WaitCurrentThread(WaitType wait_type, Object* wait_object, VAddr wait_address);
 
-/// Put current thread in a wait state - on WaitSynchronization
-void WaitThread_Synchronization();
-
 /// Initialize threading
 void ThreadingInit();