diff --git a/include/wx/dlimpexp.h b/include/wx/dlimpexp.h
index 6af0cd5f26..93fa16dd7f 100644
--- a/include/wx/dlimpexp.h
+++ b/include/wx/dlimpexp.h
@@ -77,6 +77,7 @@
 #    define WXMAKINGDLL_ODBC
 #    define WXMAKINGDLL_DBGRID
 #    define WXMAKINGDLL_HTML
+#    define WXMAKINGDLL_GL
 #    define WXMAKINGDLL_XML
 #    define WXMAKINGDLL_XRC
 #    define WXMAKINGDLL_MEDIA