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-rw-r--r--ext/date/date_core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index 360f2fecdb..dbee067f6b 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -1599,7 +1599,7 @@ m_ajd(union DateData *x)
if (simple_dat_p(x)) {
r = m_real_jd(x);
- if (FIXNUM_P(r) && FIX2LONG(r) <= (FIXNUM_MAX / 2)) {
+ if (FIXNUM_P(r) && FIX2LONG(r) <= (FIXNUM_MAX / 2) && FIX2LONG(r) >= (FIXNUM_MIN + 1) / 2) {
long ir = FIX2LONG(r);
ir = ir * 2 - 1;
return rb_rational_new2(LONG2FIX(ir), INT2FIX(2));