diff --git a/src/theme-package.coffee b/src/theme-package.coffee
index d0be0a0ef..3c03d818f 100644
--- a/src/theme-package.coffee
+++ b/src/theme-package.coffee
@@ -5,7 +5,7 @@ module.exports =
 class ThemePackage extends Package
   getType: -> 'theme'
 
-  getStylesheetType: -> "theme"
+  getStylesheetType: -> 'theme'
 
   enable: ->
     atom.config.unshiftAtKeyPath('core.themes', @name)