diff --git a/src/ac/ac.default.conf b/src/ac/ac.default.conf
index ffcb0473..524b3b40 100644
--- a/src/ac/ac.default.conf
+++ b/src/ac/ac.default.conf
@@ -46,8 +46,12 @@
 # cisco_software_version
 # Software version sent, when operating in cisco-mode
 #
+# If ommited, the controller sends the same software version
+# to the WTP as the WTP has sent in discovery or join 
+# request.
+#
 # Default:
-# cisco_software_version = .x08006E00
+# cisco_software_version =