1 files changed, 1 insertions, 0 deletions

diff --git a/beatpipe.c b/beatpipe.c
index 05970cd..bae5417 100644
--- a/beatpipe.c
+++ b/beatpipe.c
@@ -25,6 +25,7 @@
 
 #include "m_pd.h"
 #include <stdio.h>
+#include <math.h>
 static t_class *beatpipe_class;