diff --git a/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
index 9bc87625cc..905db50c0b 100644
--- a/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
@@ -31,7 +31,7 @@ struct CalculationContext {
 
 class CalculatedStyleValue : public CSSStyleValue {
 public:
-    using PercentageBasis = Variant<Empty, Angle, Flex, Frequency, Length, Time>;
+    using PercentageBasis = Variant<Empty, Angle, Frequency, Length, Time>;
 
     class CalculationResult {
     public: