diff --git a/core/mutex.c b/core/mutex.c
index 434386fb2..a9d9bf749 100644
--- a/core/mutex.c
+++ b/core/mutex.c
@@ -25,7 +25,6 @@
 
 #include "mutex.h"
 #include "thread.h"
-#include "atomic.h"
 #include "sched.h"
 #include "thread.h"
 #include "irq.h"