diff --git a/webrtc/engine_configurations.h b/webrtc/engine_configurations.h
index 22b87e8509..bb28b75acc 100644
--- a/webrtc/engine_configurations.h
+++ b/webrtc/engine_configurations.h
@@ -34,12 +34,14 @@
 // (which are mandatory and don't have any defines).
 #define WEBRTC_CODEC_AVT
 
-// iLBC, G.722, PCM16B and Redundancy coding are excluded from Chromium and
-// Mozilla builds.
+// PCM16 is useful for testing and incurs only a small binary size cost.
+#define WEBRTC_CODEC_PCM16
+
+// iLBC, G.722, and Redundancy coding are excluded from Chromium and Mozilla
+// builds to reduce binary size.
 #if !defined(WEBRTC_CHROMIUM_BUILD) && !defined(WEBRTC_MOZILLA_BUILD)
 #define WEBRTC_CODEC_ILBC
 #define WEBRTC_CODEC_G722
-#define WEBRTC_CODEC_PCM16
 #define WEBRTC_CODEC_RED
 #endif  // !WEBRTC_CHROMIUM_BUILD && !WEBRTC_MOZILLA_BUILD