diff --git a/usr.bin/printenv/Makefile b/usr.bin/printenv/Makefile
index 94975bd602ed..b8fbd6a1cf19 100644
--- a/usr.bin/printenv/Makefile
+++ b/usr.bin/printenv/Makefile
@@ -1,6 +1,8 @@
+# $FreeBSD$
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
 PROG=	printenv
 MLINKS=	printenv.1 env.1
+WARNS?=	2
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/printenv/printenv.c b/usr.bin/printenv/printenv.c
index cf3383774cea..72722a363362 100644
--- a/usr.bin/printenv/printenv.c
+++ b/usr.bin/printenv/printenv.c
@@ -31,14 +31,18 @@
  * SUCH DAMAGE.
  */
 
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
 #ifndef lint
-static char copyright[] =
+static const char copyright[] =
 "@(#) Copyright (c) 1987, 1993\n\
 	The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
-static char sccsid[] = "@(#)printenv.c	8.2 (Berkeley) 5/4/95";
+static const char sccsid[] = "@(#)printenv.c	8.2 (Berkeley) 5/4/95";
 #endif /* not lint */
 
 #include <sys/types.h>