diff --git a/ChangeLog b/ChangeLog
index c3645a2768..4578664ff7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Jan 10 10:58:55 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* complex.c: removed commented-out code.
+
 Sat Jan 10 10:57:19 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* rational.c: removed commented-out code.
diff --git a/complex.c b/complex.c
index 11a394c6ce..251c120029 100644
--- a/complex.c
+++ b/complex.c
@@ -2112,10 +2112,6 @@ Init_Complex(void)
     rb_undef_method(rb_cComplex, "truncate");
     rb_undef_method(rb_cComplex, "i");
 
-#if 0 /* NUBY */
-    rb_undef_method(rb_cComplex, "//");
-#endif
-
     rb_define_method(rb_cComplex, "real", nucomp_real, 0);
     rb_define_method(rb_cComplex, "imaginary", nucomp_imag, 0);
     rb_define_method(rb_cComplex, "imag", nucomp_imag, 0);