diff --git a/prowler/providers/gcp/gcp_provider.py b/prowler/providers/gcp/gcp_provider.py
index 847480bdbfd..72529a563c1 100644
--- a/prowler/providers/gcp/gcp_provider.py
+++ b/prowler/providers/gcp/gcp_provider.py
@@ -411,7 +411,7 @@ def print_credentials(self):
 
     @staticmethod
     def get_projects(
-        credentials: Credentials, organization_id: str
+        credentials: Credentials, organization_id: str = None
     ) -> dict[str, GCPProject]:
         """
         Get the projects accessible by the provided credentials. If an organization ID is provided, only the projects under that organization are returned.