diff --git a/Userland/Libraries/LibJS/Forward.h b/Userland/Libraries/LibJS/Forward.h
index 40c37ad4bd..7f9f6ec86e 100644
--- a/Userland/Libraries/LibJS/Forward.h
+++ b/Userland/Libraries/LibJS/Forward.h
@@ -136,6 +136,7 @@ class HeapBlock;
 class Interpreter;
 class LexicalEnvironment;
 class MarkedValueList;
+class NativeFunction;
 class NativeProperty;
 class PrimitiveString;
 class Reference;