diff --git a/api/frame_transformer_interface.h b/api/frame_transformer_interface.h
index 7653bee..ca3a15a 100644
--- a/api/frame_transformer_interface.h
+++ b/api/frame_transformer_interface.h
@@ -33,7 +33,9 @@
   // Copies `data` into the owned frame payload data.
   virtual void SetData(rtc::ArrayView<const uint8_t> data) = 0;
 
-  virtual uint8_t GetPayloadType() const = 0;
+  // TODO(bugs.webrtc.org/13077) make pure virtual again after rolling into
+  // Chrome.
+  virtual uint8_t GetPayloadType() const { return 255; }
   virtual uint32_t GetSsrc() const = 0;
   virtual uint32_t GetTimestamp() const = 0;
 };