diff --git a/osm_nbi/descriptor_topics.py b/osm_nbi/descriptor_topics.py
index ddf8ffc2f579e309cb71e778cbcaf5f29080a120..8f3529cb8376cfd5d1fe31a9df3e988de5e174c7 100644
--- a/osm_nbi/descriptor_topics.py
+++ b/osm_nbi/descriptor_topics.py
@@ -670,7 +670,7 @@ class DescriptorTopic(BaseTopic):
         # to preserve current expected behaviour
         if "userDefinedData" in indata:
             data = indata.pop("userDefinedData")
-            if type(data) == dict:
+            if isinstance(data, dict):
                 indata["_admin"]["userDefinedData"] = data
             else:
                 raise EngineException(
@@ -1490,7 +1490,7 @@ class NsdTopic(DescriptorTopic):
         # to preserve current expected behaviour
         if "userDefinedData" in indata:
             data = indata.pop("userDefinedData")
-            if type(data) == dict:
+            if isinstance(data, dict):
                 indata["_admin"]["userDefinedData"] = data
             else:
                 raise EngineException(