diff --git a/tag.sh b/tag.sh
index d1cd0b3..b24ebdc 100755
--- a/tag.sh
+++ b/tag.sh
@@ -223,6 +223,8 @@ main() {
         exit 0
     fi
 
+    [ ! -f "$DB_FILE" ] && fail "Database file \"$DB_FILE\" does not exist."
+
     if [[ "$1" = "import" ]]; then
         shift
         add "path" "$@"