diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index a2e9c794c3..5a9a5d33c8 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -6703,7 +6703,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             int end = lend.value;
             if (end < 0)
             {
-                end += src.Length;
+                end += srclen;
                 if (end < 0)
                     return -1;
                 end -= testlen - 1;
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index c5dd23adc0..60a76fe99a 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -6668,7 +6668,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 if (start < 0)
                     return -1;
             }
-            else if (start >= src.Length)
+            else if (start >= srclen)
                 return -1;
 
             int end = lend.value;