diff --git a/plugins/colorize/colorize.plugin.zsh b/plugins/colorize/colorize.plugin.zsh
index 80b69190f..cb5ac36f5 100644
--- a/plugins/colorize/colorize.plugin.zsh
+++ b/plugins/colorize/colorize.plugin.zsh
@@ -6,7 +6,8 @@ alias cless="colorize_less"
 ZSH_COLORIZE_PLUGIN_PATH=$0:A
 
 colorize_check_requirements() {
-    local available_tools=("chroma" "pygmentize")
+    local -a available_tools
+    available_tools=("chroma" "pygmentize")
 
     if [ -z "$ZSH_COLORIZE_TOOL" ]; then
         if (( $+commands[pygmentize] )); then