diff --git a/routers/api/v1/repo/action.go b/routers/api/v1/repo/action.go
index 50fcd4186d..f887d84163 100644
--- a/routers/api/v1/repo/action.go
+++ b/routers/api/v1/repo/action.go
@@ -1778,7 +1778,11 @@ func buildSignature(endp string, expires, artifactID int64) []byte {
 }
 
 func buildDownloadRawEndpoint(repo *repo_model.Repository, artifactID int64) string {
-	return fmt.Sprintf("api/v1/repos/%s/%d/%s/actions/artifacts/%d/zip/raw", url.PathEscape(repo.OwnerName), repo.GroupID, url.PathEscape(repo.Name), artifactID)
+	var groupSegment string
+	if repo.GroupID > 0 {
+		groupSegment = fmt.Sprintf("%d/", repo.GroupID)
+	}
+	return fmt.Sprintf("api/v1/repos/%s/%s%s/actions/artifacts/%d/zip/raw", url.PathEscape(repo.OwnerName), groupSegment, url.PathEscape(repo.Name), artifactID)
 }
 
 func buildSigURL(ctx go_context.Context, endPoint string, artifactID int64) string {