1 files changed, 1 insertions, 0 deletions
diff --git a/Swift/QtUI/QtChatView.cpp b/Swift/QtUI/QtChatView.cpp
index 0f7e87b..d7077a5 100644
--- a/Swift/QtUI/QtChatView.cpp
+++ b/Swift/QtUI/QtChatView.cpp
@@ -95,6 +95,7 @@ void QtChatView::addToDOM(boost::shared_ptr<ChatSnippet> snippet) {
 void QtChatView::replaceLastMessage(const QString& newMessage) {
 	/* FIXME: must be queued? */
 	bool bottom = isScrolledToBottom();
+	assert(!lastElement_.isNull());
 	QWebElement replace = lastElement_.findFirst("span.swift_message");
 	assert(!replace.isNull());
 	QString old = lastElement_.toOuterXml();