1 files changed, 15 insertions, 0 deletions
diff --git a/complex.c b/complex.c
index d32ecfd3ca..19d0c3c183 100644
--- a/complex.c
+++ b/complex.c
@@ -1379,6 +1379,20 @@ nucomp_to_r(VALUE self)
 
 /*
  * call-seq:
+ *    cmp.rationalize([eps])  ->  rational
+ *
+ * Returns the value as a rational if possible.  An optional argument
+ * eps is always ignored.
+ */
+static VALUE
+nucomp_rationalize(int argc, VALUE *argv, VALUE self)
+{
+    rb_scan_args(argc, argv, "01", NULL);
+    return nucomp_to_r(self);
+}
+
+/*
+ * call-seq:
  *    nil.to_c  ->  (0+0i)
  *
  * Returns zero as a complex.
@@ -1967,6 +1981,7 @@ Init_Complex(void)
     rb_define_method(rb_cComplex, "to_i", nucomp_to_i, 0);
     rb_define_method(rb_cComplex, "to_f", nucomp_to_f, 0);
     rb_define_method(rb_cComplex, "to_r", nucomp_to_r, 0);
+    rb_define_method(rb_cComplex, "rationalize", nucomp_rationalize, -1);
     rb_define_method(rb_cNilClass, "to_c", nilclass_to_c, 0);
     rb_define_method(rb_cNumeric, "to_c", numeric_to_c, 0);