diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index c39a78ff7f..7dc3350141 100644
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -2027,6 +2027,7 @@ TempoMap::solve_map_frame (Metrics& imaginary, TempoSection* section, const fram
 			if (prev_t) {
 				if (t == section) {
 					section_prev = prev_t;
+					prev_t = t;
 					continue;
 				}
 				if (t->position_lock_style() == MusicTime) {