diff --git a/bhjwt/assertions/main.py b/bhjwt/assertions/main.py
index 0a59f2c..98f74bf 100644
--- a/bhjwt/assertions/main.py
+++ b/bhjwt/assertions/main.py
@@ -27,7 +27,7 @@ def _has_permission_to_data_resource(self, data_resource_id: str, permission: st
             "brighthive-data-resource-claims" in self.claims
             and self.claims["brighthive-data-resource-claims"].get(data_resource_id)
             is not None
-            and permission
+            and data_perm
             in self.claims["brighthive-data-resource-claims"]
             .get(data_resource_id)
             .get("permissions", [])