--- a/src/sound.c	Fri Nov 03 10:31:56 2000 +0000
+++ b/src/sound.c	Fri Nov 03 10:46:58 2000 +0000
@@ -23,6 +23,7 @@
 #include "../config.h"
 #endif
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <sys/time.h>
 #include <unistd.h>