X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/720a8fb73f1ec4860da71afb8cf0d18bfddf7691..b498c53924c571d997f97c7ff3dd81c3e66894a1:/malloc.c

diff --git a/malloc.c b/malloc.c
index 5e11ac0..fd0ddf9 100644
--- a/malloc.c
+++ b/malloc.c
@@ -3,6 +3,7 @@
  */
 
 #include <stdlib.h>
+#include <string.h>
 #include "puzzles.h"
 
 /*
@@ -45,7 +46,7 @@ void *srealloc(void *p, int size) {
  * dupstr is like strdup, but with the never-return-NULL property
  * of smalloc (and also reliably defined in all environments :-)
  */
-char *dupstr(char *s) {
+char *dupstr(const char *s) {
     char *r = smalloc(1+strlen(s));
     strcpy(r,s);
     return r;