diff --git a/src/qml/qml/qqmlpropertybinding_p.h b/src/qml/qml/qqmlpropertybinding_p.h
index 429dc09036..4dcd5c1879 100644
--- a/src/qml/qml/qqmlpropertybinding_p.h
+++ b/src/qml/qml/qqmlpropertybinding_p.h
@@ -62,7 +62,7 @@
 QT_BEGIN_NAMESPACE
 
 namespace QV4 {
-    class BoundFunction;
+    struct BoundFunction;
 }
 
 class QQmlPropertyBinding;