diff --git a/org/qmckl_sherman_morrison_woodbury.org b/org/qmckl_sherman_morrison_woodbury.org
index 9b4de48..8d7d753 100644
--- a/org/qmckl_sherman_morrison_woodbury.org
+++ b/org/qmckl_sherman_morrison_woodbury.org
@@ -1019,7 +1019,7 @@ qmckl_exit_code qmckl_sherman_morrison_smw32s(const qmckl_context context,
    #+begin_src f90 :tangle (eval fh_func) :comments org :exports none
    interface
      integer(c_int32_t) function qmckl_sherman_morrison_smw32s &
-	 (context, Dim, N_updates, Updates, Updates_index, breakdown, Slater_inv) &
+	 (context, Dim, N_updates, Updates, Updates_index, breakdown, Slater_inv, determinant) &
 	 bind(C)
        use, intrinsic :: iso_c_binding
        import
@@ -1032,6 +1032,7 @@ qmckl_exit_code qmckl_sherman_morrison_smw32s(const qmckl_context context,
        integer (c_int64_t) , intent(in)         :: Updates_index(N_updates)
        real    (c_double ) , intent(in) , value :: breakdown
        real    (c_double ) , intent(inout)      :: Slater_inv(Dim*Dim)
+       real    (c_double ) , intent(inout)      :: determinant
 
      end function qmckl_sherman_morrison_smw32s
    end interface