diff --git a/lib/base/utility.cpp b/lib/base/utility.cpp
index 21aff8b36..1eae0f3a3 100644
--- a/lib/base/utility.cpp
+++ b/lib/base/utility.cpp
@@ -330,7 +330,7 @@ void Utility::Sleep(double timeout)
 #ifndef _WIN32
 	usleep(timeout * 1000 * 1000);
 #else /* _WIN32 */
-	Sleep(timeout * 1000);
+	::Sleep(timeout * 1000);
 #endif /* _WIN32 */
 }