diff --git a/gql/transport/httpx.py b/gql/transport/httpx.py
index 4c1d4f0f..cfc25dc9 100644
--- a/gql/transport/httpx.py
+++ b/gql/transport/httpx.py
@@ -32,7 +32,7 @@
 class _HTTPXTransport:
     file_classes: Tuple[Type[Any], ...] = (io.IOBase,)
 
-    reponse_headers: Optional[httpx.Headers] = None
+    response_headers: Optional[httpx.Headers] = None
 
     def __init__(
         self,