diff --git a/misc/cgo/test/callback_c.c b/misc/cgo/test/callback_c.c
index 5ae237b..7694c83 100644
--- a/misc/cgo/test/callback_c.c
+++ b/misc/cgo/test/callback_c.c
@@ -36,7 +36,7 @@
 long long
 mysleep(int seconds) {
 	long long st = GetTickCount();
-	sleep(seconds);
+	Sleep(1000 * seconds);
 	return st;
 }
 #else