diff --git a/usr.sbin/pppd/options.c b/usr.sbin/pppd/options.c
index 663d5e0bd4f3..f18131ca55e3 100644
--- a/usr.sbin/pppd/options.c
+++ b/usr.sbin/pppd/options.c
@@ -430,7 +430,7 @@ static struct cmd {
 #define IMPLEMENTATION ""
 #endif
 
-static char *usage_string = "\
+static const char usage_string[] = "\
 pppd version %s patch level %d%s\n\
 Usage: %s [ options ], where options are:\n\
 	<device>	Communicate over the named device\n\
diff --git a/usr.sbin/pstat/pstat.c b/usr.sbin/pstat/pstat.c
index 2ab1649a60e6..75eb1a6f1206 100644
--- a/usr.sbin/pstat/pstat.c
+++ b/usr.sbin/pstat/pstat.c
@@ -699,7 +699,7 @@ kinfo_vnodes(avnodes)
 	return ((struct e_vnode *)vbuf);
 }
 
-char hdr[] =
+const char hdr[] =
 "  LINE RAW CAN OUT IHIWT ILOWT OHWT LWT     COL STATE  SESS      PGID DISC\n";
 int ttyspace = 128;
 
diff --git a/usr.sbin/stallion/stlload/stlload.c b/usr.sbin/stallion/stlload/stlload.c
index 163f4ff99cf3..552fce3ce842 100644
--- a/usr.sbin/stallion/stlload/stlload.c
+++ b/usr.sbin/stallion/stlload/stlload.c
@@ -55,7 +55,7 @@ static const char rcsid[] =
 /*****************************************************************************/
 
 char	*version = "1.0.0";
-char	*defdevice = "/dev/staliomem%d";
+const char defdevice[] = "/dev/staliomem%d";
 char	*image = BOOTDIR "/cdk.sys";
 char	*oldimage = BOOTDIR "/2681.sys";