diff -ru gsm-broken/src/code.c gsm/src/code.c
--- gsm-broken/src/code.c	2006-04-26 21:16:50.000000000 +0200
+++ gsm/src/code.c	2016-04-05 17:13:19.000000000 +0200
@@ -19,6 +19,7 @@
 #include	"private.h"
 #include	"gsm.h"
 #include	"proto.h"
+#include	<string.h>
 
 /* 
  *  4.2 FIXED POINT IMPLEMENTATION OF THE RPE-LTP CODER