diff --git a/src/gos/gos_cmsis.c b/src/gos/gos_cmsis.c
index bfbafd62..ea4a6599 100644
--- a/src/gos/gos_cmsis.c
+++ b/src/gos/gos_cmsis.c
@@ -55,7 +55,7 @@ void gfxSemDestroy(gfxSem* psem)
 
 bool_t gfxSemWait(gfxSem* psem, delaytime_t ms)
 {
-	if (osSemaphoreWait(psem->id, ms) == osOK) {
+	if (osSemaphoreWait(psem->id, ms) > 0) {
 		psem->available++;
 		return TRUE;
 	}