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-rw-r--r--rational.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/rational.c b/rational.c
index ad235498ba..f5eb2c3aea 100644
--- a/rational.c
+++ b/rational.c
@@ -1488,6 +1488,7 @@ Init_Rational(void)
rb_cRational = rb_define_class(RATIONAL_NAME, rb_cNumeric);
rb_define_alloc_func(rb_cRational, nurat_s_alloc);
+ rb_undef_method(CLASS_OF(rb_cRational), "allocate");
#if 0
rb_define_private_method(CLASS_OF(rb_cRational), "new!", nurat_s_new_bang, -1);