diff --git a/config/action.d/osx-ipfw.conf b/config/action.d/osx-ipfw.conf
index b7f2f376..416344a7 100644
--- a/config/action.d/osx-ipfw.conf
+++ b/config/action.d/osx-ipfw.conf
@@ -79,6 +79,9 @@ blocktype = unreach port
 setnum = 10
 
 # Option:  number for ipfw rule
-# Notes:   This is ment to be automaticly generated and not overwritten
+# Notes:   This is meant to be automaticly generated and not overwritten
 # Values:  Random value between 10000 and 12000
-rulenum = "`a=$((RANDOM%%2000+10000)); while ipfw show | grep -q ^$a\ ; do a=$((RANDOM%%2000+10000)); done; echo $a`"
+rulenum="`echo $((RANDOM%%2000+10000))`"
+
+# Duplicate prevention mechanism
+#rulenum = "`a=$((RANDOM%%2000+10000)); while ipfw show | grep -q ^$a\ ; do a=$((RANDOM%%2000+10000)); done; echo $a`"