fix deprecated prototypes

1 files changed, 3 insertions, 3 deletions

diff --git a/src/hfield.c b/src/hfield.c
index 3043327..357386f 100644
--- a/src/hfield.c
+++ b/src/hfield.c
@@ -1,6 +1,6 @@
 #include "hfield.h"
 
-static char *(hname[]) = {
+static const char *hname[] = {
     "unknown-header",
     "sender",
     "from",
@@ -32,7 +32,7 @@ static char *(hname[]) = {
     "mail-followup-to",
     0};
 
-static int hmatch(char *s, int len, char *t)
+static int hmatch(char *s, int len, const char *t)
 {
   int i;
   char ch;
@@ -56,7 +56,7 @@ static int hmatch(char *s, int len, char *t)
 int hfield_known(char *s, int len)
 {
   int i;
-  char *t;
+  const char *t;
 
   for (i = 1; (t = hname[i]); ++i)
     if (hmatch(s, len, t)) return i;