diff --git a/src/Assetic/Util/CssUtils.php b/src/Assetic/Util/CssUtils.php
index ebc44b031..8c4e45147 100644
--- a/src/Assetic/Util/CssUtils.php
+++ b/src/Assetic/Util/CssUtils.php
@@ -22,7 +22,7 @@ abstract class CssUtils
     const REGEX_IMPORTS         = '/@import (?:url\()?(\'|"|)(?P<url>[^\'"\)\n\r]*)\1\)?;?/';
     const REGEX_IMPORTS_NO_URLS = '/@import (?!url\()(\'|"|)(?P<url>[^\'"\)\n\r]*)\1;?/';
     const REGEX_IE_FILTERS      = '/src=(["\']?)(?P<url>.*?)\\1/';
-    const REGEX_COMMENTS        = '/(\/\*[^*]*\*+(?:[^\/][^*]*\*+)*\/)/';
+    const REGEX_COMMENTS        = '/(?:("|\')[^\/]*\/+\*[^"\s]*\1)\K|(\/\*(?:[^\/][^*]*\*+)*\/)/';
 
     /**
      * Filters all references -- url() and "@import" -- through a callable.