diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
index 818f4b21dd..331af1c30b 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
@@ -152,12 +152,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
 
         public void CheckSenseRepeaterEvents()
         {
-            // Nothing to do here?
-            if (SenseRepeaters.Count == 0)
-                return;
-
             lock (SenseRepeatListLock)
             {
+                // Nothing to do here?
+                if (SenseRepeaters.Count == 0)
+                    return;
+
                 // Go through all timers
                 foreach (SenseRepeatClass ts in SenseRepeaters)
                 {