diff --git a/libs/ardour/ardour/lv2_plugin.h b/libs/ardour/ardour/lv2_plugin.h
index 088fd8d605..8014202322 100644
--- a/libs/ardour/ardour/lv2_plugin.h
+++ b/libs/ardour/ardour/lv2_plugin.h
@@ -30,6 +30,8 @@
 #include <vector>
 #include <boost/enable_shared_from_this.hpp>
 
+#include "temporal/tempo.h"
+
 #include "ardour/plugin.h"
 #include "ardour/plugin_scan_result.h"
 #include "ardour/uri_map.h"
@@ -389,6 +391,8 @@ class LIBARDOUR_API LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
 	void do_remove_preset (std::string);
 	void find_presets ();
 	void add_state (XMLNode *) const;
+
+	Temporal::GridIterator grid_iterator;
 };
 
 
diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index 1317a2bae0..c391122075 100644
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -2875,9 +2875,9 @@ LV2Plugin::connect_and_run(BufferSet& bufs,
 
 					if (!got_grid) {
 						got_grid = true;
-						tmap->get_grid (tempo_map_points,
-								samples_to_superclock (start0, TEMPORAL_SAMPLE_RATE),
-								samples_to_superclock (end, TEMPORAL_SAMPLE_RATE), 0);
+						tmap->get_grid (grid_iterator, tempo_map_points,
+						                samples_to_superclock (start0, TEMPORAL_SAMPLE_RATE),
+						                samples_to_superclock (end, TEMPORAL_SAMPLE_RATE), 0);
 					}
 				}