diff --git a/modules/rhizo_base/templates/vars.xml.erb b/modules/rhizo_base/templates/vars.xml.erb
index 77e02cb..29ca29b 100644
--- a/modules/rhizo_base/templates/vars.xml.erb
+++ b/modules/rhizo_base/templates/vars.xml.erb
@@ -146,7 +146,7 @@
        127 - BV32
 
   -->
-  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,AMR,GSM"/>
+  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=G729,AMR,GSM,PCMA"/>
   <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=G729,AMR,GSM"/>
 
   <!--