diff --git a/highlighters/main/main-highlighter.zsh b/highlighters/main/main-highlighter.zsh
index f5fd41e..7d4410d 100644
--- a/highlighters/main/main-highlighter.zsh
+++ b/highlighters/main/main-highlighter.zsh
@@ -279,8 +279,9 @@ _zsh_highlight_main_highlighter()
                           style=$ZSH_HIGHLIGHT_STYLES[reserved-word]
                           _zsh_highlight_main_add_region_highlight $start_pos $((start_pos + 2)) $style
                           already_added=1
-                        elif [[ $arg == '()' ]]; then
+                        elif [[ $arg == '()' || $arg == $'\x28' ]]; then
                           # anonymous function
+                          # subshell
                           style=$ZSH_HIGHLIGHT_STYLES[reserved-word]
                         else
                           if _zsh_highlight_main_highlighter_check_path; then
diff --git a/highlighters/main/test-data/subshell.zsh b/highlighters/main/test-data/subshell.zsh
index aee6c49..18d2a23 100644
--- a/highlighters/main/test-data/subshell.zsh
+++ b/highlighters/main/test-data/subshell.zsh
@@ -31,7 +31,7 @@ BUFFER='tar cf - * | (cd /target; tar xfp -)'
 
 expected_region_highlight=(
   "1 3 $ZSH_HIGHLIGHT_STYLES[command]" # tar
-  "14 14 $ZSH_HIGHLIGHT_STYLES[reserved-word] 'issue #166'" # (
+  "14 14 $ZSH_HIGHLIGHT_STYLES[reserved-word]" # (
   "15 16 $ZSH_HIGHLIGHT_STYLES[command]" # cd
   "27 29 $ZSH_HIGHLIGHT_STYLES[command]" # tar
   #"36 36 $ZSH_HIGHLIGHT_STYLES[?]" # )