1 files changed, 10 insertions, 0 deletions
diff --git a/ext/-test-/bignum/bigzero.c b/ext/-test-/bignum/bigzero.c
index 5181d71aab..2f7c272744 100644
--- a/ext/-test-/bignum/bigzero.c
+++ b/ext/-test-/bignum/bigzero.c
@@ -9,8 +9,18 @@ bug_big_zero(VALUE self, VALUE length)
     return z;
 }
 
+static VALUE
+bug_big_negzero(VALUE self, VALUE length)
+{
+    long len = NUM2ULONG(length);
+    VALUE z = rb_big_new(len, 0);
+    MEMZERO(RBIGNUM_DIGITS(z), BDIGIT, len);
+    return z;
+}
+
 void
 Init_bigzero(VALUE klass)
 {
     rb_define_singleton_method(klass, "zero", bug_big_zero, 1);
+    rb_define_singleton_method(klass, "negzero", bug_big_negzero, 1);
 }