diff --git a/reqwest-middleware/src/client.rs b/reqwest-middleware/src/client.rs
index 09e6340..cae0045 100644
--- a/reqwest-middleware/src/client.rs
+++ b/reqwest-middleware/src/client.rs
@@ -143,7 +143,7 @@ impl fmt::Debug for ClientWithMiddleware {
         // skipping middleware_stack field for now
         f.debug_struct("ClientWithMiddleware")
             .field("inner", &self.inner)
-            .finish()
+            .finish_non_exhaustive()
     }
 }