diff --git a/install_opendkim.sh b/install_opendkim.sh
index 2fcf58f..170d378 100755
--- a/install_opendkim.sh
+++ b/install_opendkim.sh
@@ -495,7 +495,7 @@ while IFS='' read -r _line || [[ -n $_line ]] ; do
       _found=false
    fi
 
-   if echo "$_line" | grep -i -q -E "^\s*127.0.0.1:10025\s+inet\s+" 2> /dev/null ; then
+   if echo "$_line" | grep -i -q -E "^\s*(127.0.0.1|localhost):10025\s+inet\s+" 2> /dev/null ; then
       _found=true
    fi