diff --git a/src/pc/djui/djui_chat_message.h b/src/pc/djui/djui_chat_message.h
index b046a1419..67f99eb77 100644
--- a/src/pc/djui/djui_chat_message.h
+++ b/src/pc/djui/djui_chat_message.h
@@ -2,7 +2,7 @@
 #include "djui.h"
 
 #define MAX_CHAT_MSG_LENGTH 500
-#define MAX_CHAT_PACKET_LENGTH 600
+#define MAX_CHAT_PACKET_LENGTH (MAX_CONFIG_STRING + MAX_CHAT_PACKET_LENGTH + 19)
 
 struct DjuiChatMessage {
     struct DjuiBase base;