diff --git a/highlighters/main/main-highlighter.zsh b/highlighters/main/main-highlighter.zsh
index 7ebc971..f0e32de 100644
--- a/highlighters/main/main-highlighter.zsh
+++ b/highlighters/main/main-highlighter.zsh
@@ -1677,7 +1677,7 @@ _zsh_highlight_main_highlighter_expand_path()
 # -------------------------------------------------------------------------------------------------
 
 _zsh_highlight_main__precmd_hook() {
-  _zsh_highlight_main__command_type_cache=()
+  typeset -gA _zsh_highlight_main__command_type_cache=()
 }
 
 autoload -Uz add-zsh-hook