diff --git a/minix/lib/libmthread/pthread_compat.c b/minix/lib/libmthread/pthread_compat.c
index 00715802e..1a4b92e74 100644
--- a/minix/lib/libmthread/pthread_compat.c
+++ b/minix/lib/libmthread/pthread_compat.c
@@ -59,7 +59,7 @@ int pthread_mutex_trylock(pthread_mutex_t *mutex)
 		mthread_mutex_init(mutex, NULL);	
 	}
 
-	return pthread_mutex_trylock(mutex);
+	return mthread_mutex_trylock(mutex);
 }
 
 /*===========================================================================*