diff --git a/src/highlight.zsh b/src/highlight.zsh
index 41cc0ac..97c3279 100644
--- a/src/highlight.zsh
+++ b/src/highlight.zsh
@@ -15,7 +15,7 @@ _zsh_autosuggest_highlight_reset() {
 _zsh_autosuggest_highlight_apply() {
 	if [ $#POSTDISPLAY -gt 0 ]; then
 		_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
-		region_highlight+=($_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT)
+		region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
 	else
 		unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 	fi
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index a2a3bd8..c466ebc 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -196,7 +196,7 @@ _zsh_autosuggest_highlight_reset() {
 _zsh_autosuggest_highlight_apply() {
 	if [ $#POSTDISPLAY -gt 0 ]; then
 		_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
-		region_highlight+=($_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT)
+		region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
 	else
 		unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 	fi