Another missing #include.

diff --git a/src/lib/audio_filter.cc b/src/lib/audio_filter.cc
index 96af75674cc1369d72f781b25078e5761ad2d495..ed4657328374f63e0055c79431891f631fa7c9ed 100644 (file)
--- a/src/lib/audio_filter.cc
+++ b/src/lib/audio_filter.cc
@@ -21,6 +21,7 @@
 
 #include "audio_filter.h"
 #include "audio_buffers.h"
+#include "maths_util.h"
 #include "util.h"
 #include <cmath>