diff --git a/README b/README
index 0efd14949..8913f1205 100644
--- a/README
+++ b/README
@@ -10,6 +10,7 @@ This is Linphone, a free (GPL) video softphone based on the SIP protocol.
 - you need at least:
  	- belle-sip>=1.0.0
 	- speex>=1.2.0 (including libspeexdsp part)
+	- libxml2
 	
 	+ if you want the gtk/glade interface:
 		- libgtk >=2.16.0
@@ -32,7 +33,7 @@ This is Linphone, a free (GPL) video softphone based on the SIP protocol.
 
 	Here is the command line to get these dependencies installed for Ubuntu && Debian 
 
-	$ sudo apt-get install libtool intltool libgtk2.0-dev libosip2-dev libexosip2-dev libspeexdsp-dev libavcodec-dev libswscale-dev libx11-dev libvx-dev libgl1-mesa-dev libglew1.6-dev libv4l-dev
+	$ sudo apt-get install libtool intltool libgtk2.0-dev libosip2-dev libexosip2-dev libspeexdsp-dev libavcodec-dev libswscale-dev libx11-dev libxv-dev libgl1-mesa-dev libglew1.6-dev libv4l-dev libxml2-dev
 
 	+ for optional library
 	$ sudo apt-get install libreadline-dev libgsm1-dev libtheora-dev libsoup2.4-dev libsqlite3-dev libupnp4-dev
diff --git a/coreapi/bellesip_sal/sal_op_call.c b/coreapi/bellesip_sal/sal_op_call.c
index 8a7037491..08059fb22 100644
--- a/coreapi/bellesip_sal/sal_op_call.c
+++ b/coreapi/bellesip_sal/sal_op_call.c
@@ -693,7 +693,7 @@ SalMediaDescription * sal_call_get_final_media_description(SalOp *h){
 }
 
 int sal_call_send_dtmf(SalOp *h, char dtmf){
-	if (h->dialog){
+	if (h->dialog && (belle_sip_dialog_get_state(h->dialog) == BELLE_SIP_DIALOG_CONFIRMED || belle_sip_dialog_get_state(h->dialog) == BELLE_SIP_DIALOG_EARLY)){
 		belle_sip_request_t *req=belle_sip_dialog_create_queued_request(h->dialog,"INFO");
 		if (req){
 			int bodylen;