diff --git a/src/c/threads_win32.d b/src/c/threads_win32.d
index b84f7f48c..db99e264d 100644
--- a/src/c/threads_win32.d
+++ b/src/c/threads_win32.d
@@ -229,7 +229,7 @@ mp_process_yield(void)
 #ifdef HAVE_SCHED_YIELD
 	sched_yield();
 #else
-	sleep(0); /* Use sleep(0) to yield to a >= priority thread */
+	Sleep(0); /* Use sleep(0) to yield to a >= priority thread */
 #endif
 	@(return)
 }