diff --git a/zsh-syntax-highlighting.zsh b/zsh-syntax-highlighting.zsh
index 87967b6..e49e5a8 100644
--- a/zsh-syntax-highlighting.zsh
+++ b/zsh-syntax-highlighting.zsh
@@ -236,7 +236,7 @@ _zsh_highlight_bind_widgets()
 
   # Override ZLE widgets to make them invoke _zsh_highlight.
   local cur_widget
-  for cur_widget in ${${(f)"$(builtin zle -la)"}:#(.*|orig-*|run-help|which-command|beep|set-local-history|yank)}; do
+  for cur_widget in ${${(k)widgets}:#(.*|orig-*|run-help|which-command|beep|set-local-history|yank)}; do
     case $widgets[$cur_widget] in
 
       # Already rebound event: do nothing.