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diff --git a/ast/erfa/fk5hip.c b/ast/erfa/fk5hip.c
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+#include "erfa.h"
+
+void eraFk5hip(double r5h[3][3], double s5h[3])
+/*
+**  - - - - - - - - - -
+**   e r a F k 5 h i p
+**  - - - - - - - - - -
+**
+**  FK5 to Hipparcos rotation and spin.
+**
+**  Returned:
+**     r5h   double[3][3]  r-matrix: FK5 rotation wrt Hipparcos (Note 2)
+**     s5h   double[3]     r-vector: FK5 spin wrt Hipparcos (Note 3)
+**
+**  Notes:
+**
+**  1) This function models the FK5 to Hipparcos transformation as a
+**     pure rotation and spin;  zonal errors in the FK5 catalogue are
+**     not taken into account.
+**
+**  2) The r-matrix r5h operates in the sense:
+**
+**           P_Hipparcos = r5h x P_FK5
+**
+**     where P_FK5 is a p-vector in the FK5 frame, and P_Hipparcos is
+**     the equivalent Hipparcos p-vector.
+**
+**  3) The r-vector s5h represents the time derivative of the FK5 to
+**     Hipparcos rotation.  The units are radians per year (Julian,
+**     TDB).
+**
+**  Called:
+**     eraRv2m      r-vector to r-matrix
+**
+**  Reference:
+**
+**     F.Mignard & M.Froeschle, Astron. Astrophys. 354, 732-739 (2000).
+**
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+   double v[3];
+
+/* FK5 wrt Hipparcos orientation and spin (radians, radians/year) */
+   double epx, epy, epz;
+   double omx, omy, omz;
+
+
+   epx = -19.9e-3 * ERFA_DAS2R;
+   epy =  -9.1e-3 * ERFA_DAS2R;
+   epz =  22.9e-3 * ERFA_DAS2R;
+
+   omx = -0.30e-3 * ERFA_DAS2R;
+   omy =  0.60e-3 * ERFA_DAS2R;
+   omz =  0.70e-3 * ERFA_DAS2R;
+
+/* FK5 to Hipparcos orientation expressed as an r-vector. */
+   v[0] = epx;
+   v[1] = epy;
+   v[2] = epz;
+
+/* Re-express as an r-matrix. */
+   eraRv2m(v, r5h);
+
+/* Hipparcos wrt FK5 spin expressed as an r-vector. */
+   s5h[0] = omx;
+   s5h[1] = omy;
+   s5h[2] = omz;
+
+   return;
+
+}
+/*----------------------------------------------------------------------
+**  
+**  
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  All rights reserved.
+**  
+**  This library is derived, with permission, from the International
+**  Astronomical Union's "Standards of Fundamental Astronomy" library,
+**  available from http://www.iausofa.org.
+**  
+**  The ERFA version is intended to retain identical functionality to
+**  the SOFA library, but made distinct through different function and
+**  file names, as set out in the SOFA license conditions.  The SOFA
+**  original has a role as a reference standard for the IAU and IERS,
+**  and consequently redistribution is permitted only in its unaltered
+**  state.  The ERFA version is not subject to this restriction and
+**  therefore can be included in distributions which do not support the
+**  concept of "read only" software.
+**  
+**  Although the intent is to replicate the SOFA API (other than
+**  replacement of prefix names) and results (with the exception of
+**  bugs;  any that are discovered will be fixed), SOFA is not
+**  responsible for any errors found in this version of the library.
+**  
+**  If you wish to acknowledge the SOFA heritage, please acknowledge
+**  that you are using a library derived from SOFA, rather than SOFA
+**  itself.
+**  
+**  
+**  TERMS AND CONDITIONS
+**  
+**  Redistribution and use in source and binary forms, with or without
+**  modification, are permitted provided that the following conditions
+**  are met:
+**  
+**  1 Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+**  
+**  2 Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in
+**    the documentation and/or other materials provided with the
+**    distribution.
+**  
+**  3 Neither the name of the Standards Of Fundamental Astronomy Board,
+**    the International Astronomical Union nor the names of its
+**    contributors may be used to endorse or promote products derived
+**    from this software without specific prior written permission.
+**  
+**  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+**  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+**  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+**  FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+**  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+**  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+**  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+**  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+**  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+**  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+**  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+**  POSSIBILITY OF SUCH DAMAGE.
+**  
+*/