diff --git a/src/c-wrapper/api/c-chat-message.cpp b/src/c-wrapper/api/c-chat-message.cpp
index 0b0ead9b3..70a92d8ec 100644
--- a/src/c-wrapper/api/c-chat-message.cpp
+++ b/src/c-wrapper/api/c-chat-message.cpp
@@ -244,7 +244,7 @@ const char *linphone_chat_message_get_custom_header(LinphoneChatMessage *msg, co
 	return L_GET_CPP_PTR_FROM_C_OBJECT(msg)->getSalCustomHeaderValue(header_name).c_str();
 }
 
-const LinphoneErrorInfo *linphone_chat_message_get_error_info(LinphoneChatMessage *msg) {
+const LinphoneErrorInfo *linphone_chat_message_get_error_info(const LinphoneChatMessage *msg) {
 	return L_GET_CPP_PTR_FROM_C_OBJECT(msg)->getErrorInfo();
 }
 
@@ -400,4 +400,4 @@ void linphone_chat_message_start_file_download(LinphoneChatMessage *msg,
 void linphone_chat_message_release(LinphoneChatMessage *msg) {
 	linphone_chat_message_deactivate(msg);
 	linphone_chat_message_unref(msg);
-}
\ No newline at end of file
+}
diff --git a/src/chat/chat-message-p.h b/src/chat/chat-message-p.h
index 17da7bb79..754701f0e 100644
--- a/src/chat/chat-message-p.h
+++ b/src/chat/chat-message-p.h
@@ -54,7 +54,7 @@ private:
 	std::shared_ptr<Content> internalContent;
 	std::unordered_map<std::string, std::string> customHeaders;
 	std::shared_ptr<EventsDb> eventsDb;
-	LinphoneErrorInfo * errorInfo;
+	mutable LinphoneErrorInfo * errorInfo;
 	belle_http_request_t *httpRequest;
 	SalOp *salOp;
 	SalCustomHeader *salCustomHeaders;
diff --git a/src/chat/chat-message.cpp b/src/chat/chat-message.cpp
index 325fcce97..2deb16b91 100644
--- a/src/chat/chat-message.cpp
+++ b/src/chat/chat-message.cpp
@@ -307,8 +307,8 @@ string ChatMessage::getSalCustomHeaderValue(string name) {
 	return sal_custom_header_find(d->salCustomHeaders, name.c_str());
 }
 
-const LinphoneErrorInfo * ChatMessage::getErrorInfo() {
-	L_D(ChatMessage);
+const LinphoneErrorInfo * ChatMessage::getErrorInfo() const {
+	L_D(const ChatMessage);
 	if (!d->errorInfo) d->errorInfo = linphone_error_info_new(); //let's do it mutable
 	linphone_error_info_from_sal_op(d->errorInfo, d->salOp);
 	return d->errorInfo;
diff --git a/src/chat/chat-message.h b/src/chat/chat-message.h
index 1c4ccc43f..1762ca5bb 100644
--- a/src/chat/chat-message.h
+++ b/src/chat/chat-message.h
@@ -120,7 +120,7 @@ public:
 	bool isToBeStored() const;
 	void setIsToBeStored(bool store);
 
-	const LinphoneErrorInfo * getErrorInfo ();
+	const LinphoneErrorInfo * getErrorInfo () const;
 	
 	bool isReadOnly () const;