diff --git a/st2common/st2common/services/action.py b/st2common/st2common/services/action.py
index 9c026f5507..e32fb39061 100644
--- a/st2common/st2common/services/action.py
+++ b/st2common/st2common/services/action.py
@@ -631,6 +631,6 @@ def is_action_execution_under_action_chain_context(liveaction):
 
 
 def get_requester(requester):
-    if type(requester) == UserDB:
+    if isinstance(requester, UserDB):
         return requester["name"]
     return requester