diff --git a/lib/codegen/styleInjection.js b/lib/codegen/styleInjection.js
index 9a8cfc99a..ea5b161ab 100644
--- a/lib/codegen/styleInjection.js
+++ b/lib/codegen/styleInjection.js
@@ -91,6 +91,7 @@ module.exports = function genStyleInjectionCode (
         const request = genStyleRequest(style, i)
         styleInjectionCode += (
           `var style${i} = require(${request})\n` +
+          `style${i} = style${i}.default || style${i}\n` +
           `if (style${i}.__inject__) style${i}.__inject__(context)\n`
         )
         if (style.module) genCSSModulesCode(style, request, i)