diff --git a/prepare.conf b/prepare.conf
index e22174d54..ef66d21e8 100644
--- a/prepare.conf
+++ b/prepare.conf
@@ -1,3 +1,4 @@
 -DENABLE_CXX_WRAPPER=YES
 -DENABLE_GTK_UI=NO
 -DENABLE_NLS=NO
+-DENABLE_WEBRTC_AEC=YES