diff --git a/sshrm b/sshrm
index 3b57779..a16910c 100755
--- a/sshrm
+++ b/sshrm
@@ -4,9 +4,9 @@ declare -r FILENAME="${HOME}/.ssh/known_hosts"
 declare HOST=""
 
 if [ ! "${1}" == "" ]; then
-	case ${1} in
-		*[!0-9]*) HOST=$(sed -n -e "${1}"p "${FILENAME}" | awk '{print $1}') ;;
-		*) HOST=${1} ;;
+	case "${1}" in
+		*[!0-9]*) HOST=${1} ;;
+		*) HOST=$(sed -n -e ${1}p "${FILENAME}" | awk '{print $1}') ;;
 	esac
 	ssh-keygen -R "${HOST}"
 else