diff --git a/libs/evoral/src/debug.cpp b/libs/evoral/src/debug.cpp
new file mode 100644
index 0000000000..28f30d0be3
--- /dev/null
+++ b/libs/evoral/src/debug.cpp
@@ -0,0 +1,5 @@
+#include "evoral/types.hpp"
+
+uint64_t PBD::DEBUG::Sequence = PBD::new_debug_bit ("sequence");
+uint64_t PBD::DEBUG::Note = PBD::new_debug_bit ("note");
+