diff --git a/org/qmckl_sherman_morrison_woodbury.org b/org/qmckl_sherman_morrison_woodbury.org
index 61c4a45..56f7309 100644
--- a/org/qmckl_sherman_morrison_woodbury.org
+++ b/org/qmckl_sherman_morrison_woodbury.org
@@ -48,6 +48,10 @@ int main() {
 *** Source
 *** Performance
 
+** C interface
+
+   #+CALL: generate_c_interface(table=qmckl_distance_sq_args,rettyp=get_value("FRetType"),fname=get_value("Name"))
+
 * End of files
 
    #+begin_src c :comments link :tangle (eval c_test)