diff --git a/pyatv/protocols/companion/auth.py b/pyatv/protocols/companion/auth.py
index ab27ae831..240641af7 100644
--- a/pyatv/protocols/companion/auth.py
+++ b/pyatv/protocols/companion/auth.py
@@ -158,7 +158,10 @@ async def verify_credentials(self) -> bool:
             },
         )
 
-        # TODO: check status code
+        # check status code
+        if resp['_pd'][2] != 4:
+            _LOGGER.warning("companion pairing credentials are invalid")
+            raise exceptions.AuthenticationError("companion pairing credentials are invalid")
 
         return True