diff --git a/themes/agnoster.zsh-theme b/themes/agnoster.zsh-theme
index 07546fd34..120303fd1 100644
--- a/themes/agnoster.zsh-theme
+++ b/themes/agnoster.zsh-theme
@@ -66,7 +66,7 @@ prompt_segment() {
 # End the prompt, closing any open segments
 prompt_end() {
   if [[ -n $CURRENT_BG ]]; then
-    echo -n " %{%k%F{$CURRENT_BG}%}$SEGMENT_SEPARATOR"
+    echo -n " %{%K%F{$CURRENT_BG}%}$SEGMENT_SEPARATOR"
   else
     echo -n "%{%k%}"
   fi