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-rw-r--r--internal/rational.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal/rational.h b/internal/rational.h
index e53ee7b499..6bbd2a9810 100644
--- a/internal/rational.h
+++ b/internal/rational.h
@@ -33,6 +33,7 @@ VALUE rb_rational_div(VALUE self, VALUE other);
VALUE rb_lcm(VALUE x, VALUE y);
VALUE rb_rational_reciprocal(VALUE x);
VALUE rb_cstr_to_rat(const char *, int);
+VALUE rb_rational_hash(VALUE self);
VALUE rb_rational_abs(VALUE self);
VALUE rb_rational_cmp(VALUE self, VALUE other);
VALUE rb_rational_pow(VALUE self, VALUE other);