diff --git a/src/lib/empthread/ntthread.c b/src/lib/empthread/ntthread.c
index 7187ab64..c642af06 100644
--- a/src/lib/empthread/ntthread.c
+++ b/src/lib/empthread/ntthread.c
@@ -510,6 +510,7 @@ void
 empth_yield(void)
 {
     loc_BlockThisThread();
+    Sleep(0);
     loc_RunThisThread(NULL);
 }