--- ./src/mkfs.fat.c.orig
+++ ./src/mkfs.fat.c
@@ -1412,7 +1412,7 @@
 
     gettimeofday(&create_timeval, NULL);
     create_time = create_timeval.tv_sec;
-    volume_id = (u_int32_t) ((create_timeval.tv_sec << 20) | create_timeval.tv_usec);	/* Default volume ID = creation time, fudged for more uniqueness */
+    volume_id = (uint32_t) ((create_timeval.tv_sec << 20) | create_timeval.tv_usec);	/* Default volume ID = creation time, fudged for more uniqueness */
     check_atari();
 
     printf("mkfs.fat " VERSION " (" VERSION_DATE ")\n");