diff --git a/libs/ardour/session_process.cc b/libs/ardour/session_process.cc
index 33b188161c..2c3b1fe982 100644
--- a/libs/ardour/session_process.cc
+++ b/libs/ardour/session_process.cc
@@ -1258,6 +1258,12 @@ Session::plan_master_strategy_engine (pframes_t nframes, double master_speed, sa
 
 		DEBUG_TRACE (DEBUG::Slave, "JACK transport: not moving\n");
 
+		if (!transport_stopped_or_stopping()) {
+			DEBUG_TRACE (DEBUG::Slave, "JACK Transport: jack is stopped, we are not, so stop ...\n");
+			TFSM_STOP (false, false);
+			return 1.0;
+		}
+
 		const samplecnt_t wlp = worst_latency_preroll_buffer_size_ceil ();
 
 		if (delta != wlp) {