--- src/p-connection.cc.orig	2021-03-16 13:03:09.000000000 -0500
+++ src/p-connection.cc	2023-03-14 06:04:40.000000000 -0500
@@ -18,6 +18,7 @@
 */
 
 #include <octave/oct.h>
+#include <octave/cdef-object.h>
 #include <octave/Array.cc>
 
 #include "parallel-gnutls.h"