diff --git a/libs/canvas/wave_view_private.cc b/libs/canvas/wave_view_private.cc
index 2688730cc5..a788eb9c6f 100644
--- a/libs/canvas/wave_view_private.cc
+++ b/libs/canvas/wave_view_private.cc
@@ -17,6 +17,9 @@
 
 */
 
+#include <cmath>
+#include "ardour/lmath.h"
+
 #include "canvas/wave_view_private.h"
 
 #include "pbd/cpus.h"