1 files changed, 1 insertions, 1 deletions
diff --git a/src/expr.c b/src/expr.c
index 99bbdd8fd..7f9f5323d 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -236,7 +236,7 @@ int_value (intmax_t i)
 /* Return a VALUE for S.  */
 
 static VALUE *
-str_value (char *s)
+str_value (char const *s)
 {
   VALUE *v = xmalloc (sizeof *v);
   v->type = string;