diff --git a/coreapi/bellesip_sal/sal_op_message.c b/coreapi/bellesip_sal/sal_op_message.c
index 39e98e65b..6b3147625 100644
--- a/coreapi/bellesip_sal/sal_op_message.c
+++ b/coreapi/bellesip_sal/sal_op_message.c
@@ -98,8 +98,6 @@ void sal_process_incoming_message(SalOp *op,const belle_sip_request_event_t *eve
 			saliscomposing.from=from;
 			saliscomposing.text=belle_sip_message_get_body(BELLE_SIP_MESSAGE(req));
 			op->base.root->callbacks.is_composing_received(op,&saliscomposing);
-			resp = belle_sip_response_create_from_request(req,200);
-			belle_sip_server_transaction_send_response(server_transaction,resp);
 			belle_sip_object_unref(address);
 			belle_sip_free(from);
 		} else {
diff --git a/coreapi/callbacks.c b/coreapi/callbacks.c
index 428368dc4..95d5a3d30 100644
--- a/coreapi/callbacks.c
+++ b/coreapi/callbacks.c
@@ -1163,13 +1163,14 @@ static void text_received(SalOp *op, const SalMessage *msg){
 	if (reason == LinphoneReasonNone && is_duplicate_msg(lc, msg->message_id) == FALSE) {
 		reason = linphone_core_message_received(lc, op, msg);
 	}
-	sal_message_reply(op,linphone_reason_to_sal(reason));
+	sal_message_reply(op, linphone_reason_to_sal(reason));
 	if (!call) sal_op_release(op);
 }
 
 static void is_composing_received(SalOp *op, const SalIsComposing *is_composing) {
 	LinphoneCore *lc = (LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
-	linphone_core_is_composing_received(lc, op, is_composing);
+	LinphoneReason reason = linphone_core_is_composing_received(lc, op, is_composing);
+	sal_message_reply(op, linphone_reason_to_sal(reason));
 	sal_op_release(op);
 }
 
diff --git a/coreapi/chat.c b/coreapi/chat.c
index 1e6202d49..6bc224dcb 100644
--- a/coreapi/chat.c
+++ b/coreapi/chat.c
@@ -702,10 +702,11 @@ static void linphone_chat_room_notify_is_composing(LinphoneChatRoom *cr, const c
 	linphone_xmlparsing_context_destroy(xml_ctx);
 }
 
-void linphone_core_is_composing_received(LinphoneCore *lc, SalOp *op, const SalIsComposing *is_composing) {
+LinphoneReason linphone_core_is_composing_received(LinphoneCore *lc, SalOp *op, const SalIsComposing *is_composing) {
 	LinphoneAddress *addr = linphone_address_new(is_composing->from);
 	LinphoneChatRoom *cr = _linphone_core_get_chat_room(lc, addr);
 	LinphoneImEncryptionEngine *imee = linphone_core_get_im_encryption_engine(lc);
+	LinphoneReason reason = LinphoneReasonNone;
 
 	if (cr != NULL) {
 		int retval = -1;
@@ -720,10 +721,14 @@ void linphone_core_is_composing_received(LinphoneCore *lc, SalOp *op, const SalI
 		}
 		if (retval <= 0) {
 			linphone_chat_room_notify_is_composing(cr, msg->message);
+		} else {
+			reason = linphone_error_code_to_reason(retval);
 		}
 		linphone_chat_message_unref(msg);
 	}
 	linphone_address_destroy(addr);
+	
+	return reason;
 }
 
 bool_t linphone_chat_room_is_remote_composing(const LinphoneChatRoom *cr) {
diff --git a/coreapi/private.h b/coreapi/private.h
index b83415e9d..898677377 100644
--- a/coreapi/private.h
+++ b/coreapi/private.h
@@ -551,7 +551,7 @@ LinphoneProxyConfig *linphone_proxy_config_new_from_config_file(LinphoneCore *lc
 void linphone_proxy_config_write_to_config_file(struct _LpConfig* config,LinphoneProxyConfig *obj, int index);
 
 LinphoneReason linphone_core_message_received(LinphoneCore *lc, SalOp *op, const SalMessage *msg);
-void linphone_core_is_composing_received(LinphoneCore *lc, SalOp *op, const SalIsComposing *is_composing);
+LinphoneReason linphone_core_is_composing_received(LinphoneCore *lc, SalOp *op, const SalIsComposing *is_composing);
 void linphone_core_real_time_text_received(LinphoneCore *lc, LinphoneChatRoom *cr, uint32_t character, LinphoneCall *call);
 
 void linphone_call_init_stats(LinphoneCallStats *stats, int type);