diff --git a/bin/OpenSimDefaults.ini b/bin/OpenSimDefaults.ini
index d3f183e7d4..275c2075c3 100644
--- a/bin/OpenSimDefaults.ini
+++ b/bin/OpenSimDefaults.ini
@@ -1397,6 +1397,11 @@
     ; Maximum number of external urls that scripts can set up in this simulator (e.g. via llRequestURL())
     max_external_urls_per_simulator = 100
 
+    ; Use version 1 of llCastRay as default if true. If set to false, the new
+    ; version of llCastRay will be used.  This gives better accuracy but 
+    ; uses more CPU and may may be slow on some servers 
+    UseLlCastRayV1 = true
+
     ; Use size boxes instead of meshed prims, sculpts and mesh when calculating bounding boxes.
     ; Speeds up calculations but can make them inaccurate, in some cases very inaccurate.
     UseSimpleBoxesInGetBoundingBox = false