diff --git a/.zshrc b/.zshrc
index 7b1d16a..d899656 100644
--- a/.zshrc
+++ b/.zshrc
@@ -19,7 +19,8 @@ SPROMPT='zsh: correct %F{red}%R%f to %F{green}%r%f [nyae]? '
 WORDCHARS=${WORDCHARS//[\/]}
 
 # Set window title format
-zstyle ':zim:termtitle' format '%~:${${(A)=1:-zsh}[1]}'
+# Escape % in commands
+zstyle ':zim:termtitle' format '%~:${${1:-zsh}//\\%/%%}'
 # Set window title before running a command
 zstyle ':zim:termtitle' hooks 'precmd' 'preexec'