diff --git a/include/wx/propgrid/editors.h b/include/wx/propgrid/editors.h
index 4432b37958..d9ab664eba 100644
--- a/include/wx/propgrid/editors.h
+++ b/include/wx/propgrid/editors.h
@@ -16,6 +16,10 @@
 
 #if wxUSE_PROPGRID
 
+class WXDLLIMPEXP_FWD_PROPGRID wxPGCell;
+class WXDLLIMPEXP_FWD_PROPGRID wxPGProperty;
+class WXDLLIMPEXP_FWD_PROPGRID wxPropertyGrid;
+
 // -----------------------------------------------------------------------
 // wxPGWindowList contains list of editor windows returned by CreateControls.