diff --git a/src/Ractive/config/custom/css/transform.js b/src/Ractive/config/custom/css/transform.js
index 142528d033..b1fe86c87d 100644
--- a/src/Ractive/config/custom/css/transform.js
+++ b/src/Ractive/config/custom/css/transform.js
@@ -1,5 +1,5 @@
 const selectorsPattern = /(?:^|\})?\s*([^\{\}]+)\s*\{/g;
-const commentsPattern = /\/\*.*?\*\//g;
+const commentsPattern = /\/\*[\s\S]*?\*\//g;
 const selectorUnitPattern = /((?:(?:\[[^\]+]\])|(?:[^\s\+\>~:]))+)((?:::?[^\s\+\>\~\(:]+(?:\([^\)]+\))?)*\s*[\s\+\>\~]?)\s*/g;
 const excludePattern = /^(?:@|\d+%)/;
 const dataRvcGuidPattern = /\[data-ractive-css~="\{[a-z0-9-]+\}"]/g;