diff --git a/src/proto/gui_w32.pro b/src/proto/gui_w32.pro
index a953a1d..a8c9793 100644
--- a/src/proto/gui_w32.pro
+++ b/src/proto/gui_w32.pro
@@ -14,6 +14,7 @@
 void gui_mch_create_scrollbar __ARGS((scrollbar_T *sb, int orient));
 int gui_mch_adjust_charsize __ARGS((void));
 GuiFont gui_mch_get_font __ARGS((char_u *name, int giveErrorIfMissing));
+char_u *gui_mch_get_fontname __ARGS((GuiFont font, char_u *name));
 void gui_mch_free_font __ARGS((GuiFont font));
 guicolor_T gui_mch_get_color __ARGS((char_u *name));
 int gui_mch_haskey __ARGS((char_u *name));