diff --git a/src/core/sys/posix/pthread.d b/src/core/sys/posix/pthread.d
index d78eee1568d..3a9e7e9c21f 100644
--- a/src/core/sys/posix/pthread.d
+++ b/src/core/sys/posix/pthread.d
@@ -162,8 +162,8 @@ else version( OSX )
         PTHREAD_EXPLICIT_SCHED  = 2
     }
 
-    enum PTHREAD_MUTEX_INITIALIZER  = pthread_mutex_t.init;
-    enum PTHREAD_ONCE_INIT          = pthread_once_t.init;
+    enum PTHREAD_MUTEX_INITIALIZER  = pthread_mutex_t(0x32AAABA7);
+    enum PTHREAD_ONCE_INIT          = pthread_once_t(0x30b1bcba);
 
     enum
     {