diff --git a/klippy/extras/TJC3224.py b/klippy/extras/TJC3224.py
index ec5fd0dc5e72..3242a6c37daf 100644
--- a/klippy/extras/TJC3224.py
+++ b/klippy/extras/TJC3224.py
@@ -378,7 +378,7 @@ def draw_string(
         self.byte(size)  # size
         self.word(font_color)
         self.word(background_color)
-        self.string(string)
+        self.string(string[:40])
         self.send()
 
     def draw_int_value(