diff --git a/lib/ip.bash b/lib/ip.bash
index 6abd43f..983b80d 100644
--- a/lib/ip.bash
+++ b/lib/ip.bash
@@ -1,18 +1,18 @@
-format_ip6_from_mac(){
+format_ip6_from_mac() {
   local template=$1
   IFS=':'; set $2; unset IFS
   printf "$template" 0x${3} 0x${4} 0x${5} 0x${6}
 }
 
-add_ip6(){
+add_ip6() {
   local interface=$1
   local ip=$2
   local prefixlen=$3
   if has ip; then
     _add_ip_linux "$ip" "$prefixlen" "$interface"
   elif has ifconfig; then
-    ifconfig "$interface" inet6 del "$ip" prefixlen "$prefixlen" || true
-    ifconfig "$interface" inet6 add "$ip" prefixlen "$prefixlen"
+    ifconfig "$interface" inet6 "$ip" prefixlen "$prefixlen" delete || true
+    ifconfig "$interface" inet6 "$ip" prefixlen "$prefixlen" add
   else
     die "no suitable program found to configure the network interface, need iproute2 or ifconfig"
   fi
@@ -26,8 +26,8 @@ add_ip4() {
     local cidr="$(mask2cidr $netmask)"
     _add_ip_linux "$ip" "$cidr" "$interface"
   elif has ifconfig; then
-    ifconfig "$interface" del "$ip" netmask "$netmask" || true
-    ifconfig "$interface" add "$ip" netmask "$netmask"
+    ifconfig "$interface" "$ip" netmask "$netmask" delete || true
+    ifconfig "$interface" "$ip" netmask "$netmask" add
   else
     die "no suitable program found to set ip address, need iproute2 or ifconfig"
   fi
@@ -37,4 +37,3 @@ _add_ip_linux() {
   ip addr del "$1/$2" dev "$3" || true
   ip addr add "$1/$2" dev "$3"
 }
-