diff --git a/winpr/libwinpr/synch/wait.c b/winpr/libwinpr/synch/wait.c
index a8d9aeff3..dccb071ae 100644
--- a/winpr/libwinpr/synch/wait.c
+++ b/winpr/libwinpr/synch/wait.c
@@ -105,6 +105,7 @@ DWORD WaitForSingleObject(HANDLE hHandle, DWORD dwMilliseconds)
 
 		mutex = (WINPR_MUTEX*) Object;
 
+#if _GNU_SOURCE
 		if (dwMilliseconds != INFINITE)
 		{
 			struct timespec timeout;
@@ -115,7 +116,10 @@ DWORD WaitForSingleObject(HANDLE hHandle, DWORD dwMilliseconds)
 			pthread_mutex_timedlock(&mutex->mutex, &timeout);
 		}
 		else
+#endif
+		{
 			pthread_mutex_lock(&mutex->mutex);
+		}
 	}
 	else if (Type == HANDLE_TYPE_EVENT)
 	{