diff --git a/Shorewall/functions b/Shorewall/functions
index ac81dd8af..a1f1ae7f0 100755
--- a/Shorewall/functions
+++ b/Shorewall/functions
@@ -341,22 +341,22 @@ in_subnet() # $1 = IP address, $2 = CIDR network
 }
 
 #
-# Netmask to CIDR
+# Netmask to VLSM
 #
-ip_cidr() {
+ip_vlsm() {
     local mask=`decodeaddr $1`
-    local cidr=0
+    local vlsm=0
     local x=$(( 128 $LEFTSHIFT 24 ))
 
     while [ $(( $x & $mask )) -ne 0 ]; do
 	[ $mask -eq $x ] && mask=0 || mask=$(( $mask $LEFTSHIFT 1 )) # Don't Ask...
-	cidr=$(($cidr + 1))
+	vlsm=$(($vlsm + 1))
     done
 
     if [ $(( $mask & 2147483647)) -ne 0 ]; then
 	echo "Invalid net mask: $1" >&2
     else
-	echo $cidr
+	echo $vlsm
     fi
 }
 	
diff --git a/Shorewall/shorewall b/Shorewall/shorewall
index 7aa74bbcc..399f77352 100755
--- a/Shorewall/shorewall
+++ b/Shorewall/shorewall
@@ -877,18 +877,18 @@ case "$1" in
     ipcalc)
 	if [ $# -eq 2 ]; then
 	    address=${2%/*}
-	    cidr=${2#*/}
+	    vlsm=${2#*/}
 	elif [ $# -eq 3 ]; then
 	    address=$2
-	    cidr=`ip_cidr $3`
+	    vlsm=`ip_vlsm $3`
 	else
 	    usage 1
 	fi
 	
-	[ -z "$cidr" ] && exit 2
-	[ "x$address" = "x$cidr" ] && usage 2
+	[ -z "$vlsm" ] && exit 2
+	[ "x$address" = "x$vlsm" ] && usage 2
 
-	address=$address/$cidr
+	address=$address/$vlsm
 
 	                                  echo "   CIDR=$address"
 	temp=`ip_netmask $address`;       echo "   NETMASK=`encodeaddr $temp`"