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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index b62feb9cf1..433ab6635d 100644
--- a/internal.h
+++ b/internal.h
@@ -1414,6 +1414,7 @@ void rb_encdb_set_unicode(int index);
PUREFUNC(int rb_data_is_encoding(VALUE obj));
/* enum.c */
+extern VALUE rb_cArithSeq;
VALUE rb_f_send(int argc, VALUE *argv, VALUE recv);
VALUE rb_nmin_run(VALUE obj, VALUE num, int by, int rev, int ary);