diff --git a/lib/cidr.bash b/lib/cidr.bash
index 27945c0..1055c79 100644
--- a/lib/cidr.bash
+++ b/lib/cidr.bash
@@ -2,7 +2,7 @@ mask2cidr() {
   local netmask=$1
   local nbits=0
   IFS=.
-  for dec in "$netmask"; do
+  for dec in $netmask; do
     case $dec in
       255) let nbits+=8;;
       254) let nbits+=7;;