diff --git a/sonar/permissions/permission_templates.py b/sonar/permissions/permission_templates.py
index 1b9875f2e..137c6543e 100644
--- a/sonar/permissions/permission_templates.py
+++ b/sonar/permissions/permission_templates.py
@@ -170,7 +170,8 @@ def to_json(self, export_settings: types.ConfigSettings = None) -> types.ObjectJ
             defaults.append("portfolios")
         if len(defaults) > 0:
             json_data["defaultFor"] = utilities.list_to_csv(defaults, ", ")
-
+        if not self.project_key_pattern or self.project_key_pattern == "":
+            json_data.pop("pattern")
         json_data["creationDate"] = utilities.date_to_string(self.creation_date)
         json_data["lastUpdate"] = utilities.date_to_string(self.last_update)
         return utilities.remove_nones(utilities.filter_export(json_data, _IMPORTABLE_PROPERTIES, export_settings.get("FULL_EXPORT", False)))