https://bugs.gentoo.org/874954

--- mpg123-el-1.61/id3put.c
+++ mpg123-el-1.61/id3put.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #define INLEN 30