Index: play/x11/fonts.c
--- play/x11/fonts.c.orig
+++ play/x11/fonts.c
@@ -100,7 +100,7 @@ x_font(x_display *xdpy, int font, int pixsize)
       char *pnm = nm;
       int n = 7;
       while (n--) while ((*(pnm++)= *(name++))!='-');
-      sprintf(pnm, "%d%n", pixsize, &n);
+      n = sprintf(pnm, "%d", pixsize);
       strcpy(pnm+n, name);
       tmp_fonts = XListFonts(xdpy->dpy, nm, 4, &n);
       if (n<=0) return xdpy->font;  /* should never happen (X server bug) */