diff --git a/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h b/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h
index 2685a7eeed..f81ed1e8ba 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h
+++ b/Userland/Libraries/LibWeb/CSS/Parser/ComponentValue.h
@@ -9,6 +9,7 @@
 
 #include <AK/NonnullRefPtr.h>
 #include <AK/RefPtr.h>
+#include <LibWeb/CSS/Parser/Function.h>
 #include <LibWeb/CSS/Parser/Token.h>
 #include <LibWeb/Forward.h>