diff --git a/coreapi/sal/call_op.cpp b/coreapi/sal/call_op.cpp
index 68daf9355..6c3b50ba6 100644
--- a/coreapi/sal/call_op.cpp
+++ b/coreapi/sal/call_op.cpp
@@ -76,6 +76,7 @@ belle_sip_header_allow_t *SalCallOp::create_allow(bool_t enable_update) {
 
 int SalCallOp::set_custom_body(belle_sip_message_t *msg, const Content &body) {
 	ContentType contentType = body.getContentType();
+	string contentDisposition = body.getContentDisposition();
 	size_t bodySize = body.getBody().size();
 	
 	if (bodySize > SIP_MESSAGE_BODY_LIMIT) {
@@ -87,6 +88,10 @@ int SalCallOp::set_custom_body(belle_sip_message_t *msg, const Content &body) {
 		belle_sip_header_content_type_t *content_type = belle_sip_header_content_type_create(contentType.getType().c_str(), contentType.getSubType().c_str());
 		belle_sip_message_add_header(msg, BELLE_SIP_HEADER(content_type));
 	}
+	if (!contentDisposition.empty()) {
+		belle_sip_header_content_disposition_t *contentDispositionHeader = belle_sip_header_content_disposition_create(contentDisposition.c_str());
+		belle_sip_message_add_header(msg, BELLE_SIP_HEADER(contentDispositionHeader));
+	}
 	belle_sip_header_content_length_t *content_length = belle_sip_header_content_length_create(bodySize);
 	belle_sip_message_add_header(msg, BELLE_SIP_HEADER(content_length));
 	
diff --git a/src/chat/client-group-chat-room.cpp b/src/chat/client-group-chat-room.cpp
index e5890910e..5b2246a5d 100644
--- a/src/chat/client-group-chat-room.cpp
+++ b/src/chat/client-group-chat-room.cpp
@@ -63,7 +63,6 @@ void ClientGroupChatRoom::addParticipants (const list<Address> &addresses, const
 		content.setBody(getResourceLists(sortedAddresses));
 		content.setContentType("application/resource-lists+xml");
 		content.setContentDisposition("recipient-list");
-		lInfo() << "Body size: " << content.getSize() << endl << "Body:" << endl << content.getBodyAsString();
 		CallSessionParams csp;
 		if (params)
 			csp = *params;
@@ -74,7 +73,7 @@ void ClientGroupChatRoom::addParticipants (const list<Address> &addresses, const
 		Address addr = me->getAddress();
 		addr.setParam("text");
 		session->getPrivate()->getOp()->set_contact_address(addr.getPrivate()->getInternalAddress());
-		session->startInvite(nullptr, subject);
+		session->startInvite(nullptr, subject, &content);
 		d->setState(ChatRoom::State::CreationPending);
 	}
 	// TODO
diff --git a/src/conference/session/call-session.cpp b/src/conference/session/call-session.cpp
index c28da3455..bf8e903ec 100644
--- a/src/conference/session/call-session.cpp
+++ b/src/conference/session/call-session.cpp
@@ -867,7 +867,7 @@ void CallSession::startIncomingNotification () {
 	}
 }
 
-int CallSession::startInvite (const Address *destination, const string &subject) {
+int CallSession::startInvite (const Address *destination, const string &subject, const Content *content) {
 	L_D();
 	d->subject = subject;
 	/* Try to be best-effort in giving real local or routable contact address */
@@ -884,6 +884,8 @@ int CallSession::startInvite (const Address *destination, const string &subject)
 	char *from = linphone_address_as_string(d->log->from);
 	/* Take a ref because sal_call() may destroy the CallSession if no SIP transport is available */
 	shared_ptr<CallSession> ref = getSharedFromThis();
+	if (content)
+		d->op->set_local_body(*content);
 	int result = d->op->call(from, destinationStr.c_str(), subject.empty() ? nullptr : subject.c_str());
 	ms_free(from);
 	if (result < 0) {
diff --git a/src/conference/session/call-session.h b/src/conference/session/call-session.h
index 6116895fb..d53f8d26e 100644
--- a/src/conference/session/call-session.h
+++ b/src/conference/session/call-session.h
@@ -32,6 +32,7 @@ LINPHONE_BEGIN_NAMESPACE
 
 class CallPrivate;
 class CallSessionPrivate;
+class Content;
 
 class LINPHONE_PUBLIC CallSession : public Object {
 	friend class CallPrivate;
@@ -53,7 +54,7 @@ public:
 	LinphoneStatus redirect (const std::string &redirectUri);
 	LinphoneStatus redirect (const Address &redirectAddr);
 	virtual void startIncomingNotification ();
-	virtual int startInvite (const Address *destination, const std::string &subject = "");
+	virtual int startInvite (const Address *destination, const std::string &subject = "", const Content *content = nullptr);
 	LinphoneStatus terminate (const LinphoneErrorInfo *ei = nullptr);
 	LinphoneStatus update (const CallSessionParams *csp, const std::string &subject = "");
 
diff --git a/src/conference/session/media-session.cpp b/src/conference/session/media-session.cpp
index c19d55098..c56921792 100644
--- a/src/conference/session/media-session.cpp
+++ b/src/conference/session/media-session.cpp
@@ -4249,7 +4249,7 @@ void MediaSession::startIncomingNotification () {
 	CallSession::startIncomingNotification();
 }
 
-int MediaSession::startInvite (const Address *destination, const string &subject) {
+int MediaSession::startInvite (const Address *destination, const string &subject, const Content *content) {
 	L_D();
 	linphone_core_stop_dtmf_stream(d->core);
 	d->makeLocalMediaDescription();
@@ -4265,7 +4265,7 @@ int MediaSession::startInvite (const Address *destination, const string &subject
 		d->op->set_local_media_description(d->localDesc);
 	}
 
-	int result = CallSession::startInvite(destination, subject);
+	int result = CallSession::startInvite(destination, subject, content);
 	if (result < 0) {
 		if (d->state == LinphoneCallError)
 			d->stopStreams();
diff --git a/src/conference/session/media-session.h b/src/conference/session/media-session.h
index 60e2163e2..4318d70dd 100644
--- a/src/conference/session/media-session.h
+++ b/src/conference/session/media-session.h
@@ -48,7 +48,7 @@ public:
 	LinphoneStatus resume ();
 	void sendVfuRequest ();
 	void startIncomingNotification () override;
-	int startInvite (const Address *destination, const std::string &subject = "") override;
+	int startInvite (const Address *destination, const std::string &subject = "", const Content *content = nullptr) override;
 	void startRecording ();
 	void stopRecording ();
 	LinphoneStatus update (const MediaSessionParams *msp, const std::string &subject = "");
diff --git a/src/content/content.cpp b/src/content/content.cpp
index 2c3786ea5..25cf8dd91 100644
--- a/src/content/content.cpp
+++ b/src/content/content.cpp
@@ -42,12 +42,14 @@ Content::Content (const Content &src) : ClonableObject(*new ContentPrivate) {
 	L_D();
 	d->body = src.getBody();
 	d->contentType = src.getContentType();
+	d->contentDisposition = src.getContentDisposition();
 }
 
 Content::Content (Content &&src) : ClonableObject(*new ContentPrivate) {
 	L_D();
 	d->body = move(src.getPrivate()->body);
 	d->contentType = move(src.getPrivate()->contentType);
+	d->contentDisposition = move(src.getPrivate()->contentDisposition);
 }
 
 Content &Content::operator= (const Content &src) {
@@ -55,6 +57,7 @@ Content &Content::operator= (const Content &src) {
 	if (this != &src) {
 		d->body = src.getBody();
 		d->contentType = src.getContentType();
+		d->contentDisposition = src.getContentDisposition();
 	}
 
 	return *this;
@@ -64,6 +67,7 @@ Content &Content::operator= (Content &&src) {
 	L_D();
 	d->body = move(src.getPrivate()->body);
 	d->contentType = move(src.getPrivate()->contentType);
+	d->contentDisposition = move(src.getPrivate()->contentDisposition);
 	return *this;
 }