diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 39bac824a2..e1630b3f8c 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -4678,6 +4678,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             else
             {
                 double invS = 1.0 / s;
+                if (rot.s < 0) invS = -invS;
                 return new LSL_Vector(rot.x * invS, rot.y * invS, rot.z * invS);
             }
         }
@@ -4692,6 +4693,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 rot.Normalize();
 
             double angle = 2 * Math.Acos(rot.s);
+            if (angle > Math.PI) 
+                angle = 2 * Math.PI - angle;
 
             return angle;
         }