diff --git a/tildes/scss/themes/_zenburn.scss b/tildes/scss/themes/_zenburn.scss
index b53ea64..3899b73 100644
--- a/tildes/scss/themes/_zenburn.scss
+++ b/tildes/scss/themes/_zenburn.scss
@@ -43,6 +43,6 @@ body.theme-zenburn {
 
 @include theme-preview-block(
   "zenburn",
-  map-get($default-theme, "foreground-primary"),
-  map-get($default-theme, "background-primary")
+  map-get($theme-zenburn, "foreground-primary"),
+  map-get($theme-zenburn, "background-primary")
 );