diff --git a/lib/scopeify.js b/lib/scopeify.js
index 46aa745..a44bd8a 100644
--- a/lib/scopeify.js
+++ b/lib/scopeify.js
@@ -2,7 +2,7 @@
 
 var fileScoper = require('./scoped-name');
 
-var classRegex = /(\.)([^\s\.,{\[>+~#:]*)/g;
+var classRegex = /(?:(\.)([^\s\.,{\[>+~#:]*))(?![^{]*})/g;
 var keyframesRegex = /(@\S*keyframes\s*)([^{\s]*)/g;
 
 module.exports = scopify;