diff --git a/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs b/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
index bdca67c0e3..422ff71284 100644
--- a/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
+++ b/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
@@ -7056,7 +7056,7 @@ namespace OpenSim.Region.ScriptEngine.Common
                 ret += src1[i] ^ src2[c];
 
                 c++;
-                if (c > src2.Length)
+                if (c >= src2.Length)
                     c = 0;
             }
             return llStringToBase64(ret);
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index dadad0288d..e5c6ac16df 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -6834,7 +6834,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 ret += src1[i] ^ src2[c];
 
                 c++;
-                if (c > src2.Length)
+                if (c >= src2.Length)
                     c = 0;
             }
             return llStringToBase64(ret);