diff --git a/include/wx/docview.h b/include/wx/docview.h
index e008bfe036..0ff527c403 100644
--- a/include/wx/docview.h
+++ b/include/wx/docview.h
@@ -520,7 +520,7 @@ inline size_t wxDocManager::GetNoHistoryFiles() const
 // wxDocChildFrameAny does
 // ----------------------------------------------------------------------------
 
-class wxDocChildFrameAnyBase
+class WXDLLIMPEXP_CORE wxDocChildFrameAnyBase
 {
 public:
     wxDocChildFrameAnyBase(wxDocument *doc, wxView *view)