diff --git a/src/proto/gui_w32.pro b/src/proto/gui_w32.pro
index 75edd4b..9f2e5fb 100644
--- a/src/proto/gui_w32.pro
+++ b/src/proto/gui_w32.pro
@@ -70,7 +70,7 @@
 void gui_mch_set_fg_color(guicolor_T color);
 void gui_mch_set_bg_color(guicolor_T color);
 void gui_mch_set_sp_color(guicolor_T color);
-void im_set_font(LOGFONT *lf);
+void im_set_font(LOGFONTW *lf);
 void im_set_position(int row, int col);
 void im_set_active(int active);
 int im_get_status(void);
diff --git a/src/proto/os_mswin.pro b/src/proto/os_mswin.pro
index 3e8d487..2548d00 100644
--- a/src/proto/os_mswin.pro
+++ b/src/proto/os_mswin.pro
@@ -49,6 +49,6 @@
 void serverProcessPendingMessages(void);
 char *charset_id2name(int id);
 char *quality_id2name(DWORD id);
-int get_logfont(LOGFONT *lf, char_u *name, HDC printer_dc, int verbose);
+int get_logfont(LOGFONTW *lf, char_u *name, HDC printer_dc, int verbose);
 void channel_init_winsock(void);
 /* vim: set ft=c : */