diff --git a/src/core/lib/channel/promise_based_filter.h b/src/core/lib/channel/promise_based_filter.h
index 6f3c3a24104..fa015fc6d3d 100644
--- a/src/core/lib/channel/promise_based_filter.h
+++ b/src/core/lib/channel/promise_based_filter.h
@@ -321,11 +321,11 @@ inline auto RunCall(
 }
 
 template <typename Derived>
-inline auto RunCall(
-    ServerMetadataHandle (Derived::Call::*fn)(ClientMetadata& md,
-                                              Derived* channel),
-    CallArgs call_args, NextPromiseFactory next_promise_factory,
-    FilterCallData<Derived>* call_data) -> ArenaPromise<ServerMetadataHandle> {
+inline auto RunCall(ServerMetadataHandle (Derived::Call::*fn)(
+                        ClientMetadata& md, Derived* channel),
+                    CallArgs call_args, NextPromiseFactory next_promise_factory,
+                    FilterCallData<Derived>* call_data)
+    -> ArenaPromise<ServerMetadataHandle> {
   GPR_DEBUG_ASSERT(fn == &Derived::Call::OnClientInitialMetadata);
   auto return_md = call_data->call.OnClientInitialMetadata(
       *call_args.client_initial_metadata, call_data->channel);