1 files changed, 24 insertions, 13 deletions

diff --git a/numeric.c b/numeric.c
index 5366d06139..76a64ca9cc 100644
--- a/numeric.c
+++ b/numeric.c
@@ -4069,30 +4069,41 @@ int_to_f(VALUE num)
     return DBL2NUM(val);
 }
 
+static VALUE
+fix_abs(VALUE fix)
+{
+    long i = FIX2LONG(fix);
+
+    if (i < 0) i = -i;
+
+    return LONG2NUM(i);
+}
+
 /*
  *  call-seq:
- *     fix.abs        ->  integer
- *     fix.magnitude  ->  integer
+ *     int.abs        ->  integer
+ *     int.magnitude  ->  integer
  *
- *  Returns the absolute value of +fix+.
+ *  Returns the absolute value of +int+.
  *
  *     -12345.abs   #=> 12345
  *     12345.abs    #=> 12345
+ *     -1234567890987654321.abs   #=> 1234567890987654321
  *
  */
 
 static VALUE
-fix_abs(VALUE fix)
+int_abs(VALUE num)
 {
-    long i = FIX2LONG(fix);
-
-    if (i < 0) i = -i;
-
-    return LONG2NUM(i);
+    if (FIXNUM_P(num)) {
+	return fix_abs(num);
+    }
+    else if (RB_TYPE_P(num, T_BIGNUM)) {
+	return rb_big_abs(num);
+    }
+    return Qnil;
 }
 
-
-
 /*
  *  call-seq:
  *     fix.size  ->  fixnum
@@ -4614,8 +4625,8 @@ Init_Numeric(void)
     rb_define_method(rb_cFixnum, "fdiv", fix_fdiv, 1);
     rb_define_method(rb_cFixnum, "**", fix_pow, 1);
 
-    rb_define_method(rb_cFixnum, "abs", fix_abs, 0);
-    rb_define_method(rb_cFixnum, "magnitude", fix_abs, 0);
+    rb_define_method(rb_cInteger, "abs", int_abs, 0);
+    rb_define_method(rb_cInteger, "magnitude", int_abs, 0);
 
     rb_define_method(rb_cFixnum, "==", fix_equal, 1);
     rb_define_method(rb_cFixnum, "===", fix_equal, 1);