1 files changed, 1 insertions, 0 deletions

diff --git a/uisimulator/win32/kernel.c b/uisimulator/win32/kernel.c
index 3410bc9cc9..045b03d330 100644
--- a/uisimulator/win32/kernel.c
+++ b/uisimulator/win32/kernel.c
@@ -31,6 +31,7 @@ void sleep(int ticks)
 
 void yield (void)
 {
+    Sleep (1); /* prevent busy loop */
     PostThreadMessage (GetWindowThreadProcessId (hGUIWnd,NULL), TM_YIELD, 0, 0);
 }