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-rw-r--r--ext/bigdecimal/bigdecimal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index fc74c0be53..97510fad86 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -3281,7 +3281,7 @@ rb_float_convert_to_BigDecimal(VALUE val, size_t digs, int raise_exception)
VALUE inum;
size_t RB_UNUSED_VAR(prec) = 0;
- size_t exp = 0;
+ SIGNED_VALUE exp = 0;
if (decpt > 0) {
if (decpt < len10) {
/*