diff --git a/modules/audio_coding/audio_network_adaptor/config.proto b/modules/audio_coding/audio_network_adaptor/config.proto
index 63b220ddf0..a815451993 100644
--- a/modules/audio_coding/audio_network_adaptor/config.proto
+++ b/modules/audio_coding/audio_network_adaptor/config.proto
@@ -5,6 +5,7 @@ package webrtc.audio_network_adaptor.config;
 option optimize_for = LITE_RUNTIME;
 option java_package = "org.webrtc.AudioNetworkAdaptor";
 option java_outer_classname = "Config";
+option objc_class_prefix = "WANA";
 
 message FecController {
   message Threshold {