diff --git a/api/video_codecs/vp8_frame_config.h b/api/video_codecs/vp8_frame_config.h
index e610a87..a420ac0 100644
--- a/api/video_codecs/vp8_frame_config.h
+++ b/api/video_codecs/vp8_frame_config.h
@@ -47,6 +47,12 @@
 
   bool Updates(Buffer buffer) const;
 
+  bool IntraFrame() const {
+    // Intra frames do not reference any buffers, and update all buffers.
+    return last_buffer_flags == kUpdate && golden_buffer_flags == kUpdate &&
+           arf_buffer_flags == kUpdate;
+  }
+
   bool drop_frame;
   BufferFlags last_buffer_flags;
   BufferFlags golden_buffer_flags;