diff --git a/libs/pbd/pbd/debug_rt_alloc.h b/libs/pbd/pbd/debug_rt_alloc.h
index 3e2b85e4b7..2bbea90278 100644
--- a/libs/pbd/pbd/debug_rt_alloc.h
+++ b/libs/pbd/pbd/debug_rt_alloc.h
@@ -41,8 +41,8 @@ extern void resume_rt_malloc_checks ();
 
 #else
 
-#define suspend_rt_malloc_checks () {}
-#define resume_rt_malloc_checks () {}
+#define suspend_rt_malloc_checks() {}
+#define resume_rt_malloc_checks() {}
 
 #endif