diff --git a/src/blueapi/core/bluesky_types.py b/src/blueapi/core/bluesky_types.py
index ce5fd66d3..1a2978213 100644
--- a/src/blueapi/core/bluesky_types.py
+++ b/src/blueapi/core/bluesky_types.py
@@ -75,7 +75,7 @@ def _follows_bluesky_protocols(obj: Any) -> bool:
 
 def is_bluesky_plan_generator(func: PlanGenerator) -> bool:
     try:
-        return get_type_hints(func).get("return") is MsgGenerator
+        return get_type_hints(func).get("return") == MsgGenerator
     except TypeError:
         # get_type_hints fails on some objects (such as Union or Optional)
         return False