1 files changed, 1 insertions, 1 deletions
diff --git a/xmalloc.c b/xmalloc.c
index 7bdd5303..d9726618 100644
--- a/xmalloc.c
+++ b/xmalloc.c
@@ -31,7 +31,7 @@ xmalloc (int n)
     return(p);
 }
 
-char *xstrdup(char *s)
+char *xstrdup(const char *s)
 {
     char *p;
     p = (char *) xmalloc(strlen(s)+1);