diff --git a/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java b/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java
index 44649bc2..dd5036a3 100644
--- a/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java
+++ b/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java
@@ -109,6 +109,7 @@ public void onAnswer() {
                 }
 
                 connection.setActive();
+                connection.setAudioModeIsVoip(true);
 
                 sendCallRequestToActivity(ACTION_ANSWER_CALL, null);
             }