diff --git a/libs/ardour/disk_reader.cc b/libs/ardour/disk_reader.cc
index 57976725cb..bdee3afb65 100644
--- a/libs/ardour/disk_reader.cc
+++ b/libs/ardour/disk_reader.cc
@@ -508,7 +508,7 @@ midi:
 					}
 				} else {
 					if ((samplecnt_t)c->front ()->rbuf->write_space () >= _chunk_samples) {
-						DEBUG_TRACE (DEBUG::Butler, string_compose ("%1: write space = %2 of %3\n", name (), c->front ()->rbuf->write_space (),
+						DEBUG_TRACE (DEBUG::Butler, string_compose ("%1: write space = %2 chunk size = %3\n", name (), c->front ()->rbuf->write_space (),
 						                                            _chunk_samples));
 						butler_required = true;
 					}
diff --git a/libs/ardour/session_transport.cc b/libs/ardour/session_transport.cc
index 1937dbdca5..3398d3b649 100644
--- a/libs/ardour/session_transport.cc
+++ b/libs/ardour/session_transport.cc
@@ -190,7 +190,7 @@ Session::locate (samplepos_t target_sample, bool for_loop_end, bool force, bool
 	 * changes in the value of _transport_sample.
 	 */
 
-	DEBUG_TRACE (DEBUG::Transport, string_compose ("rt-locate to %1 ts = %7, for loop end %2 force %3 mmc %4\n",
+	DEBUG_TRACE (DEBUG::Transport, string_compose ("rt-locate to %1 ts = %5, for loop end %2 force %3 mmc %4\n",
 	                                               target_sample, for_loop_end, force, with_mmc, _transport_sample));
 
 	if (!force && (_transport_sample == target_sample) && !for_loop_end) {