diff --git a/Userland/Libraries/LibCore/Forward.h b/Userland/Libraries/LibCore/Forward.h
index bc03b95431..152b5761c9 100644
--- a/Userland/Libraries/LibCore/Forward.h
+++ b/Userland/Libraries/LibCore/Forward.h
@@ -38,6 +38,7 @@ class UDPServer;
 enum class TimerShouldFireWhenNotVisible;
 
 namespace Stream {
+class File;
 class Socket;
 class Stream;
 class BufferedSocketBase;