diff --git a/libs/ardour/midi_model.cc b/libs/ardour/midi_model.cc
index e0d451d31b..5f6b07c67d 100644
--- a/libs/ardour/midi_model.cc
+++ b/libs/ardour/midi_model.cc
@@ -18,7 +18,6 @@
 
 */
 
-#define __STDC_LIMIT_MACROS 1
 #include <set>
 #include <iostream>
 #include <algorithm>