diff --git a/data/gui/widget/chatbox.cfg b/data/gui/widget/chatbox.cfg
index 1067ed48ce56..1f6bbc5518c0 100644
--- a/data/gui/widget/chatbox.cfg
+++ b/data/gui/widget/chatbox.cfg
@@ -149,6 +149,7 @@
 					[text_box]
 						id = "chat_input"
 						definition = "default"
+						max_input_length = 256
 					[/text_box]
 				[/column]