diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 9e7f239..5a91419 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -435,10 +435,18 @@
 	x = PyInt_FromLong(SIGCPU);
 	PyDict_SetItemString(d, "SIGCPU", x);
 #endif
+#ifdef SIGXCPU
+	x = PyInt_FromLong(SIGXCPU);
+	PyDict_SetItemString(d, "SIGXCPU", x);
+#endif
 #ifdef SIGFSZ
 	x = PyInt_FromLong(SIGFSZ);
 	PyDict_SetItemString(d, "SIGFSZ", x);
 #endif
+#ifdef SIGXFSZ
+	x = PyInt_FromLong(SIGXFSZ);
+	PyDict_SetItemString(d, "SIGXFSZ", x);
+#endif
 	/* Check for errors */
 	if (PyErr_Occurred())
 		Py_FatalError("can't initialize module signal");