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-rw-r--r--util.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/util.c b/util.c
index fb72931ed5..93d0547498 100644
--- a/util.c
+++ b/util.c
@@ -58,7 +58,7 @@ ruby_scan_hex(const char *start, size_t len, size_t *retlen)
static unsigned long
scan_digits(const char *str, int base, size_t *retlen, int *overflow)
{
- static signed char table[] = {
+ static const signed char table[] = {
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/*0*/ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
/*1*/ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,