diff --git a/include/wx/imaglist.h b/include/wx/imaglist.h
index e57df6cac0..7338c3fcdf 100644
--- a/include/wx/imaglist.h
+++ b/include/wx/imaglist.h
@@ -48,7 +48,7 @@ enum
 #define wxIMAGELIST_DRAW_FOCUSED        0x0008
 
 // Define the interface of platform-specific wxImageList class.
-class wxImageListBase : public wxObject
+class WXDLLIMPEXP_CORE wxImageListBase : public wxObject
 {
 public:
     /*