Index: sbin/newfs_msdos/Makefile
===================================================================
--- sbin/newfs_msdos/Makefile
+++ sbin/newfs_msdos/Makefile
@@ -9,5 +9,6 @@
 .if ${MACHINE_CPUARCH} == "arm"
 WARNS?= 3
 .endif
+CSTD=	c11
 
 .include <bsd.prog.mk>
Index: usr.sbin/makefs/Makefile
===================================================================
--- usr.sbin/makefs/Makefile
+++ usr.sbin/makefs/Makefile
@@ -17,6 +17,7 @@
 MAN=	makefs.8
 
 WARNS?=	2
+CSTD=	c11
 
 .include "${SRCDIR}/cd9660/Makefile.inc"
 .include "${SRCDIR}/ffs/Makefile.inc"