diff --git a/Vocaluxe/Lib/Draw/COpenGL.cs b/Vocaluxe/Lib/Draw/COpenGL.cs
index 517b3b4a..63d2ba07 100644
--- a/Vocaluxe/Lib/Draw/COpenGL.cs
+++ b/Vocaluxe/Lib/Draw/COpenGL.cs
@@ -469,7 +469,7 @@ namespace Vocaluxe.Lib.Draw
                     if (CTime.IsRunning())
                         delay = (int)Math.Floor(CConfig.CalcCycleTime() - CTime.GetMilliseconds());
 
-                    if (delay >= 1)
+                    if (delay >= 1 && CConfig.VSync == EOffOn.TR_CONFIG_OFF)
                         System.Threading.Thread.Sleep(delay);
 
                     CTime.CalculateFPS();