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-rw-r--r--internal/re.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal/re.h b/internal/re.h
index f85ec09ab3..3e20114665 100644
--- a/internal/re.h
+++ b/internal/re.h
@@ -23,5 +23,6 @@ void rb_backref_set_string(VALUE string, long pos, long len);
void rb_match_unbusy(VALUE);
int rb_match_count(VALUE match);
VALUE rb_reg_new_ary(VALUE ary, int options);
+VALUE rb_reg_last_defined(VALUE match);
#endif /* INTERNAL_RE_H */