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diff --git a/src/metrics/Kerr_BoyerLindquist.F b/src/metrics/Kerr_BoyerLindquist.F
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+C Kerr metric in cartesian Boyer-Lindquist coordinates,
+C as per MTW box 33.2.
+C
+C Author : D. Vulcanov (Timisoara, Romania)
+C see ../../README for copyright & licensing info
+C
+C $Header$
+
+#include "cctk.h"
+#include "cctk_Parameters.h"
+
+      subroutine Exact__Kerr_BoyerLindquist(
+     $     x, y, z, t,
+     $     gdtt, gdtx, gdty, gdtz, 
+     $     gdxx, gdyy, gdzz, gdxy, gdyz, gdzx,
+     $     gutt, gutx, guty, gutz, 
+     $     guxx, guyy, guzz, guxy, guyz, guzx,
+     $     psi, Tmunu_flag)
+
+      implicit none
+
+      DECLARE_CCTK_PARAMETERS
+
+c input arguments
+      CCTK_REAL x, y
+      CCTK_DECLARE(CCTK_REAL, z,)
+      CCTK_DECLARE(CCTK_REAL, t,)
+
+c output arguments
+      CCTK_REAL gdtt, gdtx, gdty, gdtz, 
+     $       gdxx, gdyy, gdzz, gdxy, gdyz, gdzx,
+     $       gutt, gutx, guty, gutz, 
+     $       guxx, guyy, guzz, guxy, guyz, guzx
+      CCTK_DECLARE(CCTK_REAL, psi,)
+      LOGICAL   Tmunu_flag
+    
+      CCTK_REAL arad, marad
+
+C This is a vacuum spacetime with no cosmological constant
+      Tmunu_flag = .false.
+
+       arad = Kerr_BoyerLindquist__spin
+      marad = Kerr_BoyerLindquist__mass
+     
+      gdtt = -(y**2*arad**2+x**2-2*marad*x)/(x**2+y**2*arad**2)
+      gdtx = 2*(arad*marad*x*(y**2-1))/(x**2+y**2*arad**2)
+      gdty = 0.d0
+      gdtz = 0.d0
+      gdxx = -(x**4+x**2*arad**2+2*arad**2*marad*x+arad**2*y**2*x**2 - 2*arad**2*y**2*marad*x+arad**4*y**2)*(y**2-1)/(x**2+arad**2*y**2)   
+      gdyy = (x**2+y**2*arad**2)/(x**2-2*marad*x+arad**2) 
+      gdzz =  -(x**2+y**2*arad**2)/(y**2-1)
+      gdxy = 0.d0
+      gdyz = 0.d0
+      gdzx = 0.d0
+
+      gutt = -(-x**4-x**2*arad**2-2*arad**2*marad*x-arad**2*y**2*x**2 +2*arad**2*y**2*marad*x-arad**4*y**2)/((x**2+arad**2*y**2)*(-x**2+2*marad*x-arad**2))
+      gutx = 2*(arad*marad*x)/((x**2+arad**2*y**2)*(-x**2+2*marad*x-arad**2))
+      guty = 0.d0
+      gutz = 0.d0
+      guxx = -(-arad**2*y**2-x**2+2*marad*x)/((x**2+arad**2*y**2)*(y**2-1)*(-x**2+2*marad*x-arad**2))
+      guyy = -(-x**2+2*marad*x-arad**2)/(x**2+arad**2*y**2)
+      guzz = -(y**2-1)/(x**2+arad**2*y**2)
+      guxy = 0.d0
+      guyz = 0.d0
+      guzx = 0.d0
+
+      return
+      end