diff --git a/okhttp/third_party/okhttp/java/io/grpc/okhttp/internal/framed/Http2.java b/okhttp/third_party/okhttp/java/io/grpc/okhttp/internal/framed/Http2.java
index 0ad535fab77..786c7a4a4b1 100644
--- a/okhttp/third_party/okhttp/java/io/grpc/okhttp/internal/framed/Http2.java
+++ b/okhttp/third_party/okhttp/java/io/grpc/okhttp/internal/framed/Http2.java
@@ -301,7 +301,8 @@ private void readSettings(Handler handler, int length, byte flags, int streamId)
           case 6: // SETTINGS_MAX_HEADER_LIST_SIZE
             break; // Advisory only, so ignored.
           default:
-            throw ioException("PROTOCOL_ERROR invalid settings id: %s", id);
+            // Implementations MUST ignore any unknown or unsupported identifier.
+            continue;
         }
         settings.set(id, 0, value);
       }