diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 55567d1826..7e48659644 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -10780,7 +10780,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
             LSL_List remaining = SetPrimParams(obj, rules);
 
-            while (remaining != null && remaining.Length > 2)
+            while ((object)remaining != null && remaining.Length > 2)
             {
                 LSL_Integer newLink = remaining.GetLSLIntegerItem(0);
                 LSL_List newrules = remaining.GetSublist(1, -1);