@@ -23,11 +23,10 @@
 #import "ObjFW_RT.h"
 #import "private.h"
 #import "threading.h"
 
 static of_rmutex_t global_mutex;
-static of_once_t once_control = OF_ONCE_INIT;
 
 static void
 init(void)
 {
 	if (!of_rmutex_new(&global_mutex))
@@ -35,10 +34,11 @@
 }
 
 void
 objc_global_mutex_lock(void)
 {
+	static of_once_t once_control = OF_ONCE_INIT;
 	of_once(&once_control, init);
 
 	if (!of_rmutex_lock(&global_mutex))
 		OBJC_ERROR("Failed to lock global mutex!");
 }