diff --git a/studio-v2/app/messages/_components/ChatArea.tsx b/studio-v2/app/messages/_components/ChatArea.tsx
index e1b4856..f66b39b 100644
--- a/studio-v2/app/messages/_components/ChatArea.tsx
+++ b/studio-v2/app/messages/_components/ChatArea.tsx
@@ -181,7 +181,7 @@ function ChatHeader({ isDark, conversation, contact, showContactInfo, setShowCon
 
         {/* Actions */}
         <div className="flex items-center gap-2">
-          <HeaderButton isDark={isDark} active={conversation.pinned}
+          <HeaderButton isDark={isDark} active={conversation.pinned ?? false}
             activeColor="amber" onClick={() => pinConversation(conversation.id)}
             title={conversation.pinned ? 'Nicht mehr anheften' : 'Anheften'}>
             <svg className="w-5 h-5" fill={conversation.pinned ? 'currentColor' : 'none'} stroke="currentColor" viewBox="0 0 24 24">