diff --git a/src/meta/txtp.c b/src/meta/txtp.c
index 2ee82e85..e763162c 100644
--- a/src/meta/txtp.c
+++ b/src/meta/txtp.c
@@ -4,6 +4,8 @@
 #include "../mixing.h"
 #include "../plugins.h"
 
+#include <math.h>
+
 
 #define TXTP_LINE_MAX 1024
 #define TXTP_MIXING_MAX 512