diff --git a/Libraries/LibWeb/CSS/MediaQuery.cpp b/Libraries/LibWeb/CSS/MediaQuery.cpp
index 87cd73a854a..5e3cbb31eb2 100644
--- a/Libraries/LibWeb/CSS/MediaQuery.cpp
+++ b/Libraries/LibWeb/CSS/MediaQuery.cpp
@@ -144,7 +144,7 @@ MatchResult MediaFeature::evaluate(HTML::Window const* window) const
     VERIFY_NOT_REACHED();
 }
 
-bool MediaFeature::compare(HTML::Window const& window, MediaFeatureValue left, Comparison comparison, MediaFeatureValue right)
+bool MediaFeature::compare(HTML::Window const& window, MediaFeatureValue const& left, Comparison comparison, MediaFeatureValue const& right)
 {
     if (!left.is_same_type(right))
         return false;
diff --git a/Libraries/LibWeb/CSS/MediaQuery.h b/Libraries/LibWeb/CSS/MediaQuery.h
index 2035c9a5073..3c5edded845 100644
--- a/Libraries/LibWeb/CSS/MediaQuery.h
+++ b/Libraries/LibWeb/CSS/MediaQuery.h
@@ -173,7 +173,7 @@ private:
     {
     }
 
-    static bool compare(HTML::Window const& window, MediaFeatureValue left, Comparison comparison, MediaFeatureValue right);
+    static bool compare(HTML::Window const& window, MediaFeatureValue const& left, Comparison comparison, MediaFeatureValue const& right);
     MediaFeatureValue const& value() const { return m_value.get<MediaFeatureValue>(); }
     Range const& range() const { return m_value.get<Range>(); }