diff --git a/Userland/Libraries/LibWeb/CSS/CSSImportRule.cpp b/Userland/Libraries/LibWeb/CSS/CSSImportRule.cpp
index 6789443b5f..c088d6030d 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSImportRule.cpp
+++ b/Userland/Libraries/LibWeb/CSS/CSSImportRule.cpp
@@ -85,7 +85,7 @@ void CSSImportRule::resource_did_load()
 
     m_style_sheet = move(sheet);
 
-    m_document->style_sheets().bump_generation();
+    m_document->style_computer().invalidate_rule_cache();
     m_document->invalidate_style();
 }
 
diff --git a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
index 7ec8a5248e..b44a87eb7e 100644
--- a/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
+++ b/Userland/Libraries/LibWeb/CSS/CSSStyleSheet.cpp
@@ -42,7 +42,7 @@ DOM::ExceptionOr<unsigned> CSSStyleSheet::insert_rule(StringView rule, unsigned
 
     if (!result.is_exception()) {
         if (m_style_sheet_list) {
-            m_style_sheet_list->bump_generation();
+            m_style_sheet_list->document().style_computer().invalidate_rule_cache();
             m_style_sheet_list->document().invalidate_style();
         }
     }
@@ -61,7 +61,7 @@ DOM::ExceptionOr<void> CSSStyleSheet::delete_rule(unsigned index)
     auto result = m_rules->remove_a_css_rule(index);
     if (!result.is_exception()) {
         if (m_style_sheet_list) {
-            m_style_sheet_list->bump_generation();
+            m_style_sheet_list->document().style_computer().invalidate_rule_cache();
             m_style_sheet_list->document().invalidate_style();
         }
     }
diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
index cd4561ee5d..01425724ab 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
@@ -1071,7 +1071,7 @@ bool PropertyDependencyNode::has_cycles()
 
 void StyleComputer::build_rule_cache_if_needed() const
 {
-    if (m_rule_cache && m_rule_cache->generation == m_document.style_sheets().generation())
+    if (m_rule_cache)
         return;
     const_cast<StyleComputer&>(*this).build_rule_cache();
 }
@@ -1146,8 +1146,6 @@ void StyleComputer::build_rule_cache()
         dbgln("        Other: {}", m_rule_cache->other_rules.size());
         dbgln("        Total: {}", num_class_rules + num_id_rules + num_tag_name_rules + m_rule_cache->other_rules.size());
     }
-
-    m_rule_cache->generation = m_document.style_sheets().generation();
 }
 
 void StyleComputer::invalidate_rule_cache()
diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.h b/Userland/Libraries/LibWeb/CSS/StyleComputer.h
index 6a1e3976a7..2c688b3cc2 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.h
@@ -104,7 +104,6 @@ private:
         HashMap<FlyString, Vector<MatchingRule>> rules_by_tag_name;
         HashMap<Selector::PseudoElement, Vector<MatchingRule>> rules_by_pseudo_element;
         Vector<MatchingRule> other_rules;
-        int generation { 0 };
     };
     OwnPtr<RuleCache> m_rule_cache;
 };
diff --git a/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp b/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
index 23d6dd96d6..a43ab4711a 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
@@ -15,7 +15,7 @@ void StyleSheetList::add_sheet(NonnullRefPtr<CSSStyleSheet> sheet)
     sheet->set_style_sheet_list({}, this);
     m_sheets.append(move(sheet));
 
-    ++m_generation;
+    m_document.style_computer().invalidate_rule_cache();
     m_document.invalidate_style();
 }
 
@@ -24,7 +24,7 @@ void StyleSheetList::remove_sheet(CSSStyleSheet& sheet)
     sheet.set_style_sheet_list({}, nullptr);
     m_sheets.remove_first_matching([&](auto& entry) { return &*entry == &sheet; });
 
-    ++m_generation;
+    m_document.style_computer().invalidate_rule_cache();
     m_document.invalidate_style();
 }
 
diff --git a/Userland/Libraries/LibWeb/CSS/StyleSheetList.h b/Userland/Libraries/LibWeb/CSS/StyleSheetList.h
index 70eb915738..0fe931bece 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleSheetList.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleSheetList.h
@@ -43,9 +43,6 @@ public:
 
     bool is_supported_property_index(u32) const;
 
-    int generation() const { return m_generation; }
-    void bump_generation() { ++m_generation; }
-
     DOM::Document& document() { return m_document; }
     DOM::Document const& document() const { return m_document; }