diff --git a/highlighters/main/main-highlighter.zsh b/highlighters/main/main-highlighter.zsh
index ced9f98..513f011 100755
--- a/highlighters/main/main-highlighter.zsh
+++ b/highlighters/main/main-highlighter.zsh
@@ -153,7 +153,7 @@ _zsh_highlight_main_highlighter()
 _zsh_highlight_main_highlighter_check_assign()
 {
     setopt localoptions extended_glob
-    [[ ${(Q)arg} == [[:alpha:]_]([[:alnum:]_])#=* ]]
+    [[ $arg == [[:alpha:]_][[:alnum:]_]#(|\[*\])=* ]]
 }
 
 # Check if the argument is a path.