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-rw-r--r--internal/complex.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal/complex.h b/internal/complex.h
index 6f63a9ebeb..9eae804ddb 100644
--- a/internal/complex.h
+++ b/internal/complex.h
@@ -25,5 +25,6 @@ struct RComplex {
/* complex.c */
VALUE rb_dbl_complex_new_polar_pi(double abs, double ang);
+st_index_t rb_complex_hash(VALUE comp);
#endif /* INTERNAL_COMPLEX_H */