diff --git a/asyncua/sync.py b/asyncua/sync.py
index f19fe1b9f..a95b76252 100644
--- a/asyncua/sync.py
+++ b/asyncua/sync.py
@@ -660,6 +660,8 @@ def __init__(self, tloop: ThreadLoop, aio_node: node.Node):
         self.tloop = tloop
 
     def __eq__(self, other):
+        if not isinstance(other, SyncNode):
+            return False
         return other is not None and self.aio_obj == other.aio_obj
 
     def __ne__(self, other):