diff --git a/Userland/Libraries/LibPDF/Reader.h b/Userland/Libraries/LibPDF/Reader.h
index e3d7b50c65..d8cd5f13c2 100644
--- a/Userland/Libraries/LibPDF/Reader.h
+++ b/Userland/Libraries/LibPDF/Reader.h
@@ -9,6 +9,8 @@
 #include <AK/Debug.h>
 #include <AK/Function.h>
 #include <AK/ScopeGuard.h>
+#include <AK/Span.h>
+#include <AK/String.h>
 
 namespace PDF {