diff --git a/src/widget/form/chatform.cpp b/src/widget/form/chatform.cpp
index 933902915..b2c48a0e2 100644
--- a/src/widget/form/chatform.cpp
+++ b/src/widget/form/chatform.cpp
@@ -814,7 +814,7 @@ void ChatForm::insertChatlines(QList<ChatLine::Ptr> chatLines)
     verticalBar->setValue(savedSliderPos);
 }
 
-QDate ChatForm::addDateLineIfNeeded(QList<ChatLine::Ptr> msgs, QDate const& lastDate,
+QDate ChatForm::addDateLineIfNeeded(QList<ChatLine::Ptr>& msgs, QDate const& lastDate,
                                     History::HistMessage const& newMessage,
                                     MessageMetadata const& metadata)
 {
diff --git a/src/widget/form/chatform.h b/src/widget/form/chatform.h
index fe0cd0f2b..6b68a9059 100644
--- a/src/widget/form/chatform.h
+++ b/src/widget/form/chatform.h
@@ -128,7 +128,7 @@ private:
         {}
     };
     void handleLoadedMessages(QList<History::HistMessage> newHistMsgs, bool processUndelivered);
-    QDate addDateLineIfNeeded(QList<ChatLine::Ptr> msgs, QDate const& lastDate,
+    QDate addDateLineIfNeeded(QList<ChatLine::Ptr>& msgs, QDate const& lastDate,
                               History::HistMessage const& newMessage, MessageMetadata const& metadata);
     MessageMetadata getMessageMetadata(History::HistMessage const& histMessage);
     ChatMessage::Ptr chatMessageFromHistMessage(History::HistMessage const& histMessage,