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-rw-r--r--lib/prefix.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/prefix.c b/lib/prefix.c
index 7755d4e7..9b5c9a7a 100644
--- a/lib/prefix.c
+++ b/lib/prefix.c
@@ -29,8 +29,8 @@
#include "log.h"
/* Maskbit. */
-static u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
- 0xf8, 0xfc, 0xfe, 0xff};
+static const u_char maskbit[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0,
+ 0xf8, 0xfc, 0xfe, 0xff };
/* Number of bits in prefix type. */
#ifndef PNBBY