diff --git a/app/helpers/theme_helper.rb b/app/helpers/theme_helper.rb
index fd683786..3b3cf1e9 100644
--- a/app/helpers/theme_helper.rb
+++ b/app/helpers/theme_helper.rb
@@ -36,12 +36,8 @@ module ThemeHelper
     theme.attributes.each do |k, v|
       next unless ATTRIBUTE_MAP.key?(k)
 
-      if ATTRIBUTE_MAP[k].is_a?(Array)
-        ATTRIBUTE_MAP[k].each do |var|
-          body += "\t--#{var}: #{get_color_for_key(var, v)};\n"
-        end
-      else
-        body += "\t--#{ATTRIBUTE_MAP[k]}: #{get_color_for_key(ATTRIBUTE_MAP[k], v)};\n"
+      Array(ATTRIBUTE_MAP[k]).each do |var|
+        body += "\t--#{var}: #{get_color_for_key(var, v)};\n"
       end
     end
     body += "\t--turbolinks-progress-color: ##{lighten(theme.primary_color)}\n}"