diff --git a/Libraries/LibWeb/CSS/Parser/SelectorParsing.cpp b/Libraries/LibWeb/CSS/Parser/SelectorParsing.cpp
index 1cf881b2de3..109dcb53d5b 100644
--- a/Libraries/LibWeb/CSS/Parser/SelectorParsing.cpp
+++ b/Libraries/LibWeb/CSS/Parser/SelectorParsing.cpp
@@ -608,6 +608,7 @@ Parser::ParseErrorOr<Selector::SimpleSelector> Parser::parse_pseudo_simple_selec
                 .type = Selector::SimpleSelector::Type::PseudoClass,
                 .value = Selector::SimpleSelector::PseudoClassSelector {
                     .type = pseudo_class,
+                    .is_forgiving = true,
                     .argument_selector_list = move(argument_selector_list) }
             };
         }
diff --git a/Libraries/LibWeb/CSS/Selector.h b/Libraries/LibWeb/CSS/Selector.h
index 1f0c32ebfcd..ca5e30f261c 100644
--- a/Libraries/LibWeb/CSS/Selector.h
+++ b/Libraries/LibWeb/CSS/Selector.h
@@ -142,6 +142,8 @@ public:
             // Only used when "pseudo_class" is "NthChild" or "NthLastChild".
             ANPlusBPattern nth_child_pattern {};
 
+            // FIXME: This would make more sense as part of SelectorList but that's currently a `using`
+            bool is_forgiving { false };
             SelectorList argument_selector_list {};
 
             // Used for :lang(en-gb,dk)