diff --git a/themes/agnoster.zsh-theme b/themes/agnoster.zsh-theme
index fce20207b..24bd688cd 100644
--- a/themes/agnoster.zsh-theme
+++ b/themes/agnoster.zsh-theme
@@ -36,7 +36,7 @@ CURRENT_BG='NONE'
 
 case ${SOLARIZED_THEME:-dark} in
     light)
-      CURRENT_FG=${CURRENT_FG:-white}
+      CURRENT_FG=${CURRENT_FG:-'white'}
       CURRENT_DEFAULT_FG=${CURRENT_DEFAULT_FG:-'white'}
       ;;
     *)