Index: uitoolkit/fb/ui_font.c
--- uitoolkit/fb/ui_font.c.orig
+++ uitoolkit/fb/ui_font.c
@@ -708,7 +708,7 @@ face_found:
     goto error;
   }
 
-  face->generic.data = ((int)face->generic.data) + 1; /* ref_count */
+  face->generic.data = (void *)(((int)face->generic.data) + 1); /* ref_count */
 
   xfont->width_full =
       (face->max_advance_width * face->size->metrics.x_ppem + face->units_per_EM - 1) /
@@ -810,7 +810,7 @@ static void unload_ft(XFontStruct *xfont) {
   free(xfont->file);
 
   face = xfont->face;
-  face->generic.data = ((int)face->generic.data) - 1;
+  face->generic.data = (void *)((int)face->generic.data - 1);
   if (!face->generic.data) {
     FT_Done_Face(xfont->face);
   }