Index: head/usr.sbin/makefs/Makefile
===================================================================
--- head/usr.sbin/makefs/Makefile
+++ head/usr.sbin/makefs/Makefile
@@ -20,7 +20,6 @@
 .include "${SRCDIR}/ffs/Makefile.inc"
 
 CFLAGS+=-DHAVE_STRUCT_STAT_ST_FLAGS=1
-CFLAGS+=-DHAVE_STRUCT_STAT_ST_GEN=1
 
 .PATH: ${SRCTOP}/contrib/mtree
 CFLAGS+=-I${SRCTOP}/contrib/mtree
Index: head/usr.sbin/makefs/ffs.c
===================================================================
--- head/usr.sbin/makefs/ffs.c
+++ head/usr.sbin/makefs/ffs.c
@@ -666,9 +666,7 @@
 #if HAVE_STRUCT_STAT_ST_FLAGS
 	dinp->di_flags = cur->inode->st.st_flags;
 #endif
-#if HAVE_STRUCT_STAT_ST_GEN
-	dinp->di_gen = cur->inode->st.st_gen;
-#endif
+	dinp->di_gen = random();
 	dinp->di_uid = cur->inode->st.st_uid;
 	dinp->di_gid = cur->inode->st.st_gid;
 
@@ -716,9 +714,7 @@
 #if HAVE_STRUCT_STAT_ST_FLAGS
 	dinp->di_flags = cur->inode->st.st_flags;
 #endif
-#if HAVE_STRUCT_STAT_ST_GEN
-	dinp->di_gen = cur->inode->st.st_gen;
-#endif
+	dinp->di_gen = random();
 	dinp->di_uid = cur->inode->st.st_uid;
 	dinp->di_gid = cur->inode->st.st_gid;