1 files changed, 1 insertions, 0 deletions
diff --git a/bignum.c b/bignum.c
index e9b7726dd3..14b9b1b762 100644
--- a/bignum.c
+++ b/bignum.c
@@ -2710,6 +2710,7 @@ Init_Bignum(void)
     rb_define_method(rb_cBignum, "hash", rb_big_hash, 0);
     rb_define_method(rb_cBignum, "to_f", rb_big_to_f, 0);
     rb_define_method(rb_cBignum, "abs", rb_big_abs, 0);
+    rb_define_method(rb_cBignum, "magnitude", rb_big_abs, 0);
     rb_define_method(rb_cBignum, "size", rb_big_size, 0);
     rb_define_method(rb_cBignum, "odd?", rb_big_odd_p, 0);
     rb_define_method(rb_cBignum, "even?", rb_big_even_p, 0);