diff --git a/shell/hush.c b/shell/hush.c
index 87b9412b3..ffc4685d6 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -133,7 +133,7 @@ typedef enum {
 
 /* The descrip member of this structure is only used to make debugging
  * output pretty */
-static struct {int mode; int default_fd; char *descrip;} redir_table[] = {
+static const struct {int mode; int default_fd; const char *descrip;} redir_table[] = {
 	{ 0,                         0, "()" },
 	{ O_RDONLY,                  0, "<"  },
 	{ O_CREAT|O_TRUNC|O_WRONLY,  1, ">"  },
@@ -297,8 +297,8 @@ struct in_str {
 #define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
 
 struct built_in_command {
-	char *cmd;					/* name */
-	char *descr;				/* description */
+	const char *cmd;			/* name */
+	const char *descr;			/* description */
 	int (*function) (struct child_prog *);	/* function ptr */
 };
 
@@ -414,7 +414,7 @@ static int set_local_var(const char *s, int flg_export);
  * in the parent shell process.  If forked, of course they can not.
  * For example, 'unset foo | whatever' will parse and run, but foo will
  * still be set at the end. */
-static struct built_in_command bltins[] = {
+static const struct built_in_command bltins[] = {
 	{"bg", "Resume a job in the background", builtin_fg_bg},
 	{"break", "Exit for, while or until loop", builtin_not_written},
 	{"cd", "Change working directory", builtin_cd},
@@ -618,7 +618,7 @@ static int builtin_fg_bg(struct child_prog *child)
 /* built-in 'help' handler */
 static int builtin_help(struct child_prog *dummy)
 {
-	struct built_in_command *x;
+	const struct built_in_command *x;
 
 	printf("\nBuilt-in commands:\n");
 	printf("-------------------\n");
@@ -1076,7 +1076,7 @@ static void pseudo_exec(struct child_prog *child)
 {
 	int i, rcode;
 	char *p;
-	struct built_in_command *x;
+	const struct built_in_command *x;
 	if (child->argv) {
 		for (i=0; is_assignment(child->argv[i]); i++) {
 			debug_printf("pid %d environment modification: %s\n",getpid(),child->argv[i]);
@@ -1338,7 +1338,7 @@ static int run_pipe_real(struct pipe *pi)
 	int nextin, nextout;
 	int pipefds[2];				/* pipefds[0] is for reading */
 	struct child_prog *child;
-	struct built_in_command *x;
+	const struct built_in_command *x;
 	char *p;
 
 	nextin = 0;
diff --git a/shell/msh.c b/shell/msh.c
index 30ebc7a3a..9e9a10b9f 100644
--- a/shell/msh.c
+++ b/shell/msh.c
@@ -514,7 +514,7 @@ static int eofc(void);
 static int readc(void);
 static void unget(int c);
 static void ioecho(int c);
-static void prs(char *s);
+static void prs(const char *s);
 static void prn(unsigned u);
 static void closef(int i);
 static void closeall(void);
@@ -622,7 +622,7 @@ struct here {
 	struct here *h_next;
 };
 
-static char *signame[] = {
+static const char * const signame[] = {
 	"Signal 0",
 	"Hangup",
 	(char *) NULL,				/* interrupt */
@@ -644,10 +644,10 @@ static char *signame[] = {
 #define	NSIGNAL (sizeof(signame)/sizeof(signame[0]))
 
 struct res {
-	char *r_name;
+	const char *r_name;
 	int r_val;
 };
-static struct res restab[] = {
+static const struct res restab[] = {
 	{"for", FOR},
 	{"case", CASE},
 	{"esac", ESAC},
@@ -709,7 +709,7 @@ static char **dolv;
 static int dolc;
 static int exstat;
 static char gflg;
-static int interactive = 0;		/* Is this an interactive shell */
+static int interactive;			/* Is this an interactive shell */
 static int execflg;
 static int multiline;			/* \n changed to ; */
 static struct op *outtree;		/* result from parser */
@@ -2245,7 +2245,7 @@ char **wp;
 static int rlookup(n)
 REGISTER char *n;
 {
-	REGISTER struct res *rp;
+	REGISTER const struct res *rp;
 
 	DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n));
 
@@ -5166,7 +5166,7 @@ REGISTER struct ioarg *ap;
 }
 
 static void prs(s)
-REGISTER char *s;
+REGISTER const char *s;
 {
 	if (*s)
 		write(2, s, strlen(s));