diff --git a/Libraries/LibJS/Forward.h b/Libraries/LibJS/Forward.h
index 47ee9a13f9..d5df55ba34 100644
--- a/Libraries/LibJS/Forward.h
+++ b/Libraries/LibJS/Forward.h
@@ -35,6 +35,7 @@ class Error;
 class Exception;
 class Expression;
 class Function;
+class GlobalObject;
 class HandleImpl;
 class Heap;
 class HeapBlock;