diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index a7a51bd7d4..aa45372f6d 100644
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -1231,8 +1231,9 @@ TempoMap::add_meter_locked (const Meter& meter, const BBT_Time& bbt, samplepos_t
 
 	if (!solved && recompute) {
 		/* if this has failed to solve, there is little we can do other than to ensure that
-		   the new map is recalculated.
-		*/
+		 * the new map is valid and recalculated.
+		 */
+		remove_meter_locked (*new_meter);
 		warning << "Adding meter may have left the tempo map unsolved." << endmsg;
 		recompute_map (_metrics);
 	}