diff --git a/lib/periodic_msg_source_impl.cc b/lib/periodic_msg_source_impl.cc
index 8dbd9dd..d97b5f3 100644
--- a/lib/periodic_msg_source_impl.cc
+++ b/lib/periodic_msg_source_impl.cc
@@ -65,7 +65,7 @@ periodic_msg_source_impl::run(periodic_msg_source_impl *instance) {
 				d_finished = true;
 				if(d_quit) {
 					boost::this_thread::sleep(boost::posix_time::milliseconds(500));
-					post(pmt::mp("system"), pmt::cons(pmt::mp("done"), pmt::PMT_T));
+					post(pmt::mp("system"), pmt::cons(pmt::mp("done"), pmt::from_long(1)));
 				}
 				break;
 			}
diff --git a/lib/random_periodic_msg_source_impl.cc b/lib/random_periodic_msg_source_impl.cc
index 1bf370d..32a6d6b 100644
--- a/lib/random_periodic_msg_source_impl.cc
+++ b/lib/random_periodic_msg_source_impl.cc
@@ -70,7 +70,7 @@ random_periodic_msg_source_impl::run(random_periodic_msg_source_impl *instance)
 				d_finished = true;
 				if(d_quit) {
 					boost::this_thread::sleep(boost::posix_time::milliseconds(500));
-					post(pmt::mp("system"), pmt::cons(pmt::mp("done"), pmt::PMT_T));
+					post(pmt::mp("system"), pmt::cons(pmt::mp("done"), pmt::from_long(1)));
 				}
 				break;
 			}