diff --git a/AK/Assertions.h b/AK/Assertions.h
index 35c92442b2..d1713b9155 100644
--- a/AK/Assertions.h
+++ b/AK/Assertions.h
@@ -6,7 +6,7 @@
 #    include <assert.h>
 #    ifndef __serenity__
 #        define ASSERT assert
-#        define ASSERT_NOT_REACHED assert(false)
+#        define ASSERT_NOT_REACHED() assert(false)
 #    endif
 #endif