diff --git a/Resources/linphonerc-factory b/Resources/linphonerc-factory
index b2723780b..ba7cec73e 100644
--- a/Resources/linphonerc-factory
+++ b/Resources/linphonerc-factory
@@ -26,6 +26,7 @@ sip_random_port=0
 #whether SIP passwords must be encrypted in configuration storage file
 store_ha1_passwd=0
 deliver_imdn=1
+linphone_specs=groupchat
 
 [misc]
 #by default it is set to 30 by liblinphone