diff --git a/plugins/catalog-backend-module-gitlab/src/lib/client.ts b/plugins/catalog-backend-module-gitlab/src/lib/client.ts
index 7860c66d1a..46ff54846c 100644
--- a/plugins/catalog-backend-module-gitlab/src/lib/client.ts
+++ b/plugins/catalog-backend-module-gitlab/src/lib/client.ts
@@ -344,17 +344,17 @@ export class GitLabClient {
    * General existence check.
    * @see {@link https://docs.gitlab.com/api/repository_files/#get-file-from-repository | GitLab Repository Files API}
    *
-   * @param project - The path to the project, either the numeric ID or the namespaced path.
+   * @param projectIdentifier - The identifier of the project, either the numeric ID or the namespaced path.
    * @param branch - The branch used to search
    * @param filePath - The path to the file
    */
   async hasFile(
-    project: string,
+    projectIdentifier: string,
     branch: string,
     filePath: string,
   ): Promise<boolean> {
     const endpoint: string = `/projects/${encodeURIComponent(
-      project,
+      projectIdentifier,
     )}/repository/files/${encodeURIComponent(filePath)}`;
     const request = new URL(`${this.config.apiBaseUrl}${endpoint}`);
     request.searchParams.append('ref', branch);
diff --git a/plugins/catalog-backend-module-gitlab/src/providers/GitlabDiscoveryEntityProvider.ts b/plugins/catalog-backend-module-gitlab/src/providers/GitlabDiscoveryEntityProvider.ts
index 11b6a0ce04..24bc5faccb 100644
--- a/plugins/catalog-backend-module-gitlab/src/providers/GitlabDiscoveryEntityProvider.ts
+++ b/plugins/catalog-backend-module-gitlab/src/providers/GitlabDiscoveryEntityProvider.ts
@@ -590,7 +590,7 @@ export class GitlabDiscoveryEntityProvider implements EntityProvider {
       this.config.fallbackBranch;
 
     const hasFile = await client.hasFile(
-      project.path_with_namespace ?? '',
+      project.id.toString() ?? project.path_with_namespace ?? '',
       project_branch,
       this.config.catalogFile,
     );