diff --git a/.local/bin/delete_certain_known_hosts b/.local/bin/delete_certain_known_hosts
index a3d13a4e..e009a490 100755
--- a/.local/bin/delete_certain_known_hosts
+++ b/.local/bin/delete_certain_known_hosts
@@ -13,10 +13,15 @@ read -r -a delete_these_lines <<< "$deduped_args"
 lines_to_delete=""
 for var in "${delete_these_lines[@]}"; do
 if [[ "$var" -gt "$lines_in_known_hosts" ]]; then
-	echo "$var isnt valid line in $lines_in_known_hosts line $known_hosts_path"
+	echo "$var is invalid line in $lines_in_known_hosts line $known_hosts_path"
 else
 	lines_to_delete+="${var}d;"
 fi
 done
-sed -i "$lines_to_delete" "$known_hosts_path"
-echo "Deleted lines $(echo $(echo $lines_to_delete | sed 's/d;/, /g') | sed 's/.$//' )"
+if [[ -z "$lines_to_delete" ]]; then
+  echo "All arguments passed were invalid lines in $known_hosts_path"
+elif [[ -n "$string" ]]; then
+  sed -i "$lines_to_delete" "$known_hosts_path"
+  echo "Deleted lines $(echo $(echo $lines_to_delete | sed 's/d;/, /g') | sed 's/.$//' )"
+fi
+