diff --git a/indra/CMakeLists.txt b/indra/CMakeLists.txt
index 96b2a62e62..4b7b36735c 100644
--- a/indra/CMakeLists.txt
+++ b/indra/CMakeLists.txt
@@ -31,6 +31,9 @@ if (OPENSIM)
     message("compiling with OpenSim support")
   endif (SINGLEGRID)
 else (OPENSIM)
+  if (SINGLEGRID)
+	message( WARNING "Value for SINGLEGRID is unused during Havok/SecondLife builds" )
+  endif()
   message("compiling without OpenSim support")
 endif (OPENSIM)
 #</FS:AW optional opensim support>