diff --git a/shellrc b/shellrc
index 9b4728a..f8f4d72 100644
--- a/shellrc
+++ b/shellrc
@@ -200,10 +200,8 @@ if is_zsh; then
 	SAVEHIST=1000
 	HISTSIZE=1000
 	HISTFILE="${HOME}/.histfile"
-	if [[ -z ${TMUX} && -z ${SSH_CLIENT} ]]; then
-		if [[ ${TERM} =~ '^(rxvt-unicode|xterm)' ]]; then
-			gruvbox-colors
-		fi
+	if [[ -z ${TMUX} && -z ${SSH_CLIENT} && ( ${TERM} == rxvt-unicode-* || ${TERM} == xterm-* ) ]]; then
+		gruvbox-colors
 	fi
 
 	extras=( "${HOME}/.zshrc.extras" )