diff --git a/kitty/client.py b/kitty/client.py
index 438da5e59..541b7ac55 100644
--- a/kitty/client.py
+++ b/kitty/client.py
@@ -220,7 +220,7 @@ def report_device_attributes(mode: int, char: int) -> None:
         x += chr(char)
     if mode:
         x += str(mode)
-    write(f'{CSI}{x}c')
+    write(f'{x}c')
 
 
 def screen_decsace(mode: int) -> None: