diff --git a/OpenSim/Region/ScriptEngine/YEngine/XMRInstBackend.cs b/OpenSim/Region/ScriptEngine/YEngine/XMRInstBackend.cs
index 833211f81d..332085f4e0 100644
--- a/OpenSim/Region/ScriptEngine/YEngine/XMRInstBackend.cs
+++ b/OpenSim/Region/ScriptEngine/YEngine/XMRInstBackend.cs
@@ -61,6 +61,10 @@ namespace OpenSim.Region.ScriptEngine.Yengine
 
         protected override void ScriptSleep(int ms)
         {
+            ms = (int)((float)ms * m_ScriptDelayFactor);
+            if (ms == 0)
+                return;
+
             inst.Sleep(ms);
         }