diff --git a/src/calibre/linux.py b/src/calibre/linux.py
index ca99ac7dd5..6f70f50aeb 100644
--- a/src/calibre/linux.py
+++ b/src/calibre/linux.py
@@ -581,6 +581,7 @@ def write_completion(bash_comp_dest, zsh):
 
         complete -o nospace -C %s ebook-convert
         ''')%complete)
+    zsh.write()
 # }}}
 
 class PostInstall: