diff --git a/libs/temporal/debug.cc b/libs/temporal/debug.cc
index 3087f27603..478f40f0a2 100644
--- a/libs/temporal/debug.cc
+++ b/libs/temporal/debug.cc
@@ -26,4 +26,5 @@ PBD::DebugBits PBD::DEBUG::TemporalDomainConvert = PBD::new_debug_bit ("Temporal
 PBD::DebugBits PBD::DEBUG::Grid = PBD::new_debug_bit ("Grid");
 PBD::DebugBits PBD::DEBUG::SnapBBT = PBD::new_debug_bit ("SnapBBT");
 PBD::DebugBits PBD::DEBUG::Beats = PBD::new_debug_bit ("Beats");
+PBD::DebugBits PBD::DEBUG::MapReset = PBD::new_debug_bit ("MapReset");
 
diff --git a/libs/temporal/temporal/debug.h b/libs/temporal/temporal/debug.h
index 7db5489547..7ea1583fb6 100644
--- a/libs/temporal/temporal/debug.h
+++ b/libs/temporal/temporal/debug.h
@@ -30,6 +30,7 @@ namespace PBD {
 		LIBTEMPORAL_API extern DebugBits Grid;
 		LIBTEMPORAL_API extern DebugBits SnapBBT;
 		LIBTEMPORAL_API extern DebugBits Beats;
+		LIBTEMPORAL_API extern DebugBits MapReset;
 	}
 }