diff --git a/zsh/prompt.zsh b/zsh/prompt.zsh
index a2d8fac..e625ee9 100644
--- a/zsh/prompt.zsh
+++ b/zsh/prompt.zsh
@@ -89,14 +89,8 @@ zshrc_prompt_precmd() {
 	# suffix characters in first and second line
 	local top_suffix="%F{cyan}${top_right_corner}%f"
 	local bottom_suffix="%F{cyan}${bottom_right_corner}%f"
-	# use %{ .. %} for bottom_right_corner to remove useless space after RPROMPT
 	# remove useless space after RPROMPT
-	if [[ $TERM != "tmux-256color" ]]; then
-		# use %{ .. %} for bottom_right_corner if not in tmux
-		bottom_suffix="%{${bottom_suffix}%}"
-	else
-		ZLE_RPROMPT_INDENT=0
-	fi
+	ZLE_RPROMPT_INDENT=-1
 
 	# combine them to create the prompt
 	local top_left=""