diff --git a/gtk2_ardour/debug.cc b/gtk2_ardour/debug.cc
index 7065e6a9b6..811c246130 100644
--- a/gtk2_ardour/debug.cc
+++ b/gtk2_ardour/debug.cc
@@ -29,3 +29,4 @@ PBD::DebugBits PBD::DEBUG::Drags = PBD::new_debug_bit ("drags");
 PBD::DebugBits PBD::DEBUG::CutNPaste = PBD::new_debug_bit ("cutnpaste");
 PBD::DebugBits PBD::DEBUG::Accelerators = PBD::new_debug_bit ("accelerators");
 PBD::DebugBits PBD::DEBUG::GUITiming = PBD::new_debug_bit ("guitiming");
+PBD::DebugBits PBD::DEBUG::EngineControl = PBD::new_debug_bit ("enginecontrol");
diff --git a/gtk2_ardour/debug.h b/gtk2_ardour/debug.h
index 660e674a4a..85743505e7 100644
--- a/gtk2_ardour/debug.h
+++ b/gtk2_ardour/debug.h
@@ -30,6 +30,7 @@ namespace PBD {
                 extern DebugBits CutNPaste;
                 extern DebugBits Accelerators;
                 extern DebugBits GUITiming;
+                extern DebugBits EngineControl;
 	}
 }