opnsense-ports/audio/mp3stat/files/patch-input_vorbis_oggstat.cpp

--- input/vorbis/oggstat.cpp.orig	2004-09-16 00:32:20 UTC
+++ input/vorbis/oggstat.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "oggstat.h"
 
 using namespace std;