diff --git a/h11/_headers.py b/h11/_headers.py
index 31da3e2..171f7b5 100644
--- a/h11/_headers.py
+++ b/h11/_headers.py
@@ -108,7 +108,10 @@ def __bool__(self) -> bool:
         return bool(self._full_items)
 
     def __eq__(self, other: object) -> bool:
-        return list(self) == list(other)  # type: ignore
+                try:
+                    return list(self) == list(other)  # type: ignore
+                            except TypeError:
+                    return NotImplemented            
 
     def __len__(self) -> int:
         return len(self._full_items)