diff --git a/neurodamus/node.py b/neurodamus/node.py
index b207ad419..9c38d5c97 100644
--- a/neurodamus/node.py
+++ b/neurodamus/node.py
@@ -125,7 +125,7 @@ def get_edge_managers(self, source, destination):
 
     def get_edge_manager(self, source, destination, conn_type=SynapseRuleManager):
         managers = [manager for manager in self.get_edge_managers(source, destination)
-                    if type(manager) == conn_type]
+                    if isinstance(manager, conn_type)]
         return managers[0] if managers else None
 
     def get_create_edge_manager(self, conn_type, source, destination, src_target,