diff --git a/forgejo-release.sh b/forgejo-release.sh
index 5ba1c6e..ef6f3cd 100755
--- a/forgejo-release.sh
+++ b/forgejo-release.sh
@@ -84,7 +84,7 @@ upload_release() {
     # It is expanded using "${assets[@]}" which preserves the separation of arguments and not split whitespace containing values.
     # For reference, see https://github.com/koalaman/shellcheck/wiki/SC2086#exceptions
     local assets=()
-    for file in "$RELEASE_DIR"/*; do
+    [ -n "$RELEASE_DIR" ] && [ -d "$RELEASE_DIR" ] && for file in "$RELEASE_DIR"/*; do
         assets=("${assets[@]}" -a "$file")
     done
     if $PRERELEASE || echo "${TAG}" | grep -qi '\-rc'; then