diff --git a/Libraries/LibWeb/CSS/StyleComputer.cpp b/Libraries/LibWeb/CSS/StyleComputer.cpp
index 7de14ac6307..0f1a996b283 100644
--- a/Libraries/LibWeb/CSS/StyleComputer.cpp
+++ b/Libraries/LibWeb/CSS/StyleComputer.cpp
@@ -420,16 +420,6 @@ StyleComputer::RuleCache const* StyleComputer::rule_cache_for_cascade_origin(Cas
     return true;
 }
 
-bool StyleComputer::should_reject_with_ancestor_filter(Selector const& selector) const
-{
-    for (u32 hash : selector.ancestor_hashes()) {
-        if (hash == 0)
-            break;
-        if (!m_ancestor_filter.may_contain(hash))
-            return true;
-    }
-    return false;
-}
 Vector<MatchingRule> const& StyleComputer::get_hover_rules() const
 {
     build_rule_cache_if_needed();
diff --git a/Libraries/LibWeb/CSS/StyleComputer.h b/Libraries/LibWeb/CSS/StyleComputer.h
index 544fb95873f..8b761f5e9c1 100644
--- a/Libraries/LibWeb/CSS/StyleComputer.h
+++ b/Libraries/LibWeb/CSS/StyleComputer.h
@@ -186,7 +186,7 @@ public:
     void absolutize_values(ComputedProperties&) const;
     void compute_font(ComputedProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement::Type>) const;
 
-    [[nodiscard]] bool should_reject_with_ancestor_filter(Selector const&) const;
+    [[nodiscard]] inline bool should_reject_with_ancestor_filter(Selector const&) const;
 
 private:
     enum class ComputeStyleMode {
@@ -338,4 +338,15 @@ private:
     Function<void()> m_on_fail;
 };
 
+inline bool StyleComputer::should_reject_with_ancestor_filter(Selector const& selector) const
+{
+    for (u32 hash : selector.ancestor_hashes()) {
+        if (hash == 0)
+            break;
+        if (!m_ancestor_filter.may_contain(hash))
+            return true;
+    }
+    return false;
+}
+
 }