diff --git a/Applications/IRCClient/IRCClient.h b/Applications/IRCClient/IRCClient.h
index f276b22c73..e08220f8fa 100644
--- a/Applications/IRCClient/IRCClient.h
+++ b/Applications/IRCClient/IRCClient.h
@@ -128,8 +128,8 @@ private:
 
     String m_nickname;
     OwnPtr<CNotifier> m_notifier;
-    HashMap<String, RefPtr<IRCChannel>> m_channels;
-    HashMap<String, RefPtr<IRCQuery>> m_queries;
+    HashMap<String, RefPtr<IRCChannel>, CaseInsensitiveStringTraits> m_channels;
+    HashMap<String, RefPtr<IRCQuery>, CaseInsensitiveStringTraits> m_queries;
 
     Vector<IRCWindow*> m_windows;