diff --git a/src/servala/core/rules.py b/src/servala/core/rules.py
index 2d51145..5ead2c3 100644
--- a/src/servala/core/rules.py
+++ b/src/servala/core/rules.py
@@ -2,6 +2,10 @@ import rules
 
 
 def has_organization_role(user, org, roles):
+    from servala.core.models import Organization
+
+    if not isinstance(org, Organization):
+        return False
     memberships = org.memberships.all().filter(user=user)
     if roles:
         memberships = memberships.filter(role__in=roles)