diff --git a/Userland/Libraries/LibPDF/Forward.h b/Userland/Libraries/LibPDF/Forward.h
index 76982f2ae9..7cd61f78ca 100644
--- a/Userland/Libraries/LibPDF/Forward.h
+++ b/Userland/Libraries/LibPDF/Forward.h
@@ -6,6 +6,9 @@
 
 #pragma once
 
+#include <AK/Forward.h>
+#include <AK/StdLibExtras.h>
+
 namespace PDF {
 
 class Document;