--- a/ffs.h	2016-02-09 03:37:14.422639513 +0000
+++ b/ffs.h	2016-02-09 03:38:59.843641094 +0000
@@ -27,7 +27,10 @@
 #ifdef HAVE_ENDIAN_H
 #include <endian.h>
 #endif
-
+/* __WORDSIZE */
+#ifndef __WORDSIZE
+#include <sys/reg.h>
+#endif
 
 #ifdef HAVE_FFS
 # define myffs(x) ffs(x)
--- a/fiemap.h	2016-02-09 03:45:05.550646582 +0000
+++ b/fiemap.h	2016-02-09 03:45:56.683647349 +0000
@@ -31,3 +31,6 @@
 
 #endif	/* _FIEMAPH */
 
+#ifndef __WORDSIZE
+#include <sys/reg.h>
+#endif
--- a/libddr_hash.c	2016-02-09 03:49:16.334650345 +0000
+++ b/libddr_hash.c	2016-02-09 03:50:01.309651020 +0000
@@ -32,6 +32,9 @@
 #include <errno.h>
 #include <unistd.h>
 #include <fcntl.h>
+#ifndef __WORDSIZE
+#include <sys/reg.h>
+#endif
 
 #include <netinet/in.h>	/* For ntohl/htonl */
 #include <endian.h>
--- a/libddr_lzo.c	2016-02-09 03:52:31.775653278 +0000
+++ b/libddr_lzo.c	2016-02-09 03:52:53.537653604 +0000
@@ -26,6 +26,9 @@
 #include <errno.h>
 #include <netinet/in.h>
 #include <sys/stat.h>
+#ifndef __WORDSIZE
+#include <sys/reg.h>
+#endif
 #include <signal.h>
 #include <lzo/lzo1x.h>
 #include <lzo/lzo1y.h>
--- a/libddr_null.c	2016-02-09 03:54:04.110654663 +0000
+++ b/libddr_null.c	2016-02-09 03:54:18.018654872 +0000
@@ -10,6 +10,9 @@
 #include "ddr_ctrl.h"
 #include <string.h>
 #include <stdlib.h>
+#ifndef __WORDSIZE
+#include <sys/reg.h>
+#endif
 
 /* fwd decl */
 extern ddr_plugin_t ddr_plug;
--- a/sha512.h	2016-02-09 03:55:33.209656000 +0000
+++ b/sha512.h	2016-02-09 03:56:39.923657001 +0000
@@ -2,6 +2,10 @@
 #define _SHA512_H
 
 #include "hash.h"
+/* __WORDSIZE */
+#ifndef __WORDSIZE
+#include <sys/reg.h>
+#endif
 
 void sha512_init(hash_t *ctx);
 void sha384_init(hash_t *ctx);
--- a/fmt_no.h	2016-02-09 04:52:13.760707026 +0000
+++ b/fmt_no.h	2016-02-09 04:52:50.874707583 +0000
@@ -1,4 +1,6 @@
 /** Decl for int to str conversion with highlighting */
+#define _GNU_SOURCE
+#include <fcntl.h>
 
 #ifndef _FMT_NO_H
 #define _FMT_NO_H
--- a/fstrim.h	2016-02-09 04:55:43.871710178 +0000
+++ b/fstrim.h	2016-02-09 04:56:11.270710590 +0000
@@ -1,3 +1,6 @@
+#define _GNU_SOURCE
+#include <fcntl.h>
+
 #ifndef _FSTRIM_H
 #define _FSTRIM_H
 
--- a/ddr_ctrl.h	2016-02-09 04:58:08.442712348 +0000
+++ b/ddr_ctrl.h	2016-02-09 04:58:50.842712984 +0000
@@ -7,6 +7,9 @@
  *  License: GNU GPLv2 or v3
  */
 
+#define _GNU_SOURCE
+#include <fcntl.h>
+
 #ifndef _DDR_CTRL_H
 #define _DDR_CTRL_H