diff --git a/lib/theme.zsh b/lib/theme.zsh
index aaf01c9..54f87b5 100644
--- a/lib/theme.zsh
+++ b/lib/theme.zsh
@@ -12,5 +12,5 @@ configure_dircolors
 # This ugly hack is required only for the agnoster theme which I use. I'm
 # probably going to switch to another theme because it is so damn slow
 autoload -Uz add-zsh-hook
-_patch-prompt() { PROMPT="$PROMPT"$'\n%{%F{247}%}\u03bb>%{%b%f%} '; }
+_patch-prompt() { PROMPT="$PROMPT"$'\n%{%B%}\u03bb>%{%b%} '; }
 add-zsh-hook precmd _patch-prompt