diff --git a/vendor-overwrites/beautify/beautify-css-mod.js b/vendor-overwrites/beautify/beautify-css-mod.js
index 1b4b1ec4..c2290dfb 100644
--- a/vendor-overwrites/beautify/beautify-css-mod.js
+++ b/vendor-overwrites/beautify/beautify-css-mod.js
@@ -468,6 +468,7 @@
                     // when entering conditional groups, only rulesets are allowed
                     if (enteringConditionalGroup) {
                         enteringConditionalGroup = false;
+                        insidePropertyValue = false;
                         insideConditionalGroup = true;
                         insideRule = (indentLevel > nestedLevel);
                     } else {