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Diffstat (limited to 'lib/prefix.c')
-rw-r--r--lib/prefix.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/prefix.c b/lib/prefix.c
index 2afaa09c..c85e6594 100644
--- a/lib/prefix.c
+++ b/lib/prefix.c
@@ -29,7 +29,7 @@
#include "log.h"
/* Maskbit. */
-static u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
+static const u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0,
0xf8, 0xfc, 0xfe, 0xff};
/* Number of bits in prefix type. */