Index: webrtc/audio/BUILD.gn |
diff --git a/webrtc/audio/BUILD.gn b/webrtc/audio/BUILD.gn |
index 2c62584ece8210f77470b6d82cb57130a95f1e87..42b74ffcd6babee026b54df39f86bd6b5f9521a4 100644 |
--- a/webrtc/audio/BUILD.gn |
+++ b/webrtc/audio/BUILD.gn |
@@ -37,6 +37,7 @@ rtc_static_library("audio") { |
"..:webrtc_common", |
"../api:audio_mixer_api", |
"../api:call_api", |
+ "../api:optional", |
"../api/audio_codecs:audio_codecs_api", |
"../api/audio_codecs:builtin_audio_encoder_factory", |
"../call:call_interfaces", |