diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc
index 98257ddd7a..348f6957d4 100644
--- a/libs/ardour/amp.cc
+++ b/libs/ardour/amp.cc
@@ -16,7 +16,6 @@
     675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
-#include <iostream>
 #include <cstring>
 #include <cmath>
 #include <algorithm>