--- src/fpylll/mpfr/mpfr.pxd.orig	2018-05-24 06:36:45.000000000 -0600
+++ src/fpylll/mpfr/mpfr.pxd	2019-07-17 16:21:05.294943989 -0600
@@ -115,7 +115,7 @@ cdef extern from "mpfr.h":
     int mpfr_sqrt (mpfr_t rop, mpfr_t op, mp_rnd_t rnd)
     int mpfr_sqrt_ui (mpfr_t rop, unsigned long int op, mp_rnd_t rnd)
     int mpfr_cbrt (mpfr_t rop, mpfr_t op, mp_rnd_t rnd)
-    int mpfr_root (mpfr_t rop, mpfr_t op, unsigned long int k, mp_rnd_t rnd)
+    int mpfr_rootn_ui (mpfr_t rop, mpfr_t op, unsigned long int k, mp_rnd_t rnd)
     int mpfr_pow (mpfr_t rop, mpfr_t op1, mpfr_t op2, mp_rnd_t rnd)
     int mpfr_pow_ui (mpfr_t rop, mpfr_t op1, unsigned long int op2, mp_rnd_t rnd)
     int mpfr_pow_si (mpfr_t rop, mpfr_t op1, long int op2, mp_rnd_t rnd)