diff --git a/host/host_freebsd_amd64.go b/host/host_freebsd_amd64.go
index e37eaa4..7706cbd 100644
--- a/host/host_freebsd_amd64.go
+++ b/host/host_freebsd_amd64.go
@@ -6,23 +6,23 @@
 package host
 
 const (
-	sizeofPtr	= 0x8
-	sizeofShort	= 0x2
-	sizeofInt	= 0x4
-	sizeofLong	= 0x8
-	sizeofLongLong	= 0x8
+	sizeofPtr      = 0x8
+	sizeofShort    = 0x2
+	sizeofInt      = 0x4
+	sizeofLong     = 0x8
+	sizeofLongLong = 0x8
 )
 
 type (
-	_C_short	int16
-	_C_int		int32
-	_C_long		int64
-	_C_long_long	int64
+	_C_short     int16
+	_C_int       int32
+	_C_long      int64
+	_C_long_long int64
 )
 
 type Utmp struct {
-	Line	[8]int8
-	Name	[16]int8
-	Host	[16]int8
-	Time	int32
+	Line [8]int8
+	Name [16]int8
+	Host [16]int8
+	Time int32
 }
diff --git a/host/host_linux.go b/host/host_linux.go
index 4964b92..1a69269 100644
--- a/host/host_linux.go
+++ b/host/host_linux.go
@@ -91,10 +91,10 @@ func Users() ([]UserStat, error) {
 			continue
 		}
 		user := UserStat{
-			User:     common.ByteToString(u.UtUser[:]),
-			Terminal: common.ByteToString(u.UtLine[:]),
-			Host:     common.ByteToString(u.UtHost[:]),
-			Started:  int(u.UtTv.TvSec),
+			User:     common.IntToString(u.User[:]),
+			Terminal: common.IntToString(u.Line[:]),
+			Host:     common.IntToString(u.Host[:]),
+			Started:  int(u.Tv.TvSec),
 		}
 		ret = append(ret, user)
 	}
diff --git a/host/host_linux_amd64.go b/host/host_linux_amd64.go
index bdd1600..b04fc17 100644
--- a/host/host_linux_amd64.go
+++ b/host/host_linux_amd64.go
@@ -1,27 +1,42 @@
-// +build linux
-// +build amd64
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_linux.go
 
 package host
 
-type exitStatus struct {
-	Etermination int16 // Process termination status.
-	Eexit        int16 // Process exit status.
-}
-type timeval struct {
-	TvSec  uint32 // Seconds.
-	TvUsec uint32 // Microseconds.
-}
+const (
+	sizeofPtr      = 0x8
+	sizeofShort    = 0x2
+	sizeofInt      = 0x4
+	sizeofLong     = 0x8
+	sizeofLongLong = 0x8
+)
+
+type (
+	_C_short     int16
+	_C_int       int32
+	_C_long      int64
+	_C_long_long int64
+)
 
 type utmp struct {
-	UtType    int16      // Type of login.
-	UtPid     int32      // Process ID of login process.
-	UtLine    [32]byte   // Devicename.
-	UtID      [4]byte    // Inittab ID.
-	UtUser    [32]byte   // Username.
-	UtHost    [256]byte  // Hostname for remote login.
-	UtExit    exitStatus // Exit status of a process marked
-	UtSession int32      // Session ID, used for windowing.
-	UtTv      timeval    // Time entry was made.
-	UtAddrV6  [16]byte   // Internet address of remote host.
-	Unused    [20]byte   // Reserved for future use. // original is 20
+	Type              int16
+	Pad_cgo_0         [2]byte
+	Pid               int32
+	Line              [32]int8
+	Id                [4]int8
+	User              [32]int8
+	Host              [256]int8
+	Exit              exit_status
+	Session           int32
+	Tv                UtTv
+	Addr_v6           [4]int32
+	X__glibc_reserved [20]int8
+}
+type exit_status struct {
+	Termination int16
+	Exit        int16
+}
+type UtTv struct {
+	TvSec  int32
+	TvUsec int32
 }
diff --git a/host/host_linux_arm.go b/host/host_linux_arm.go
index b737d96..d4455ea 100644
--- a/host/host_linux_arm.go
+++ b/host/host_linux_arm.go
@@ -13,15 +13,15 @@ type timeval struct {
 }
 
 type utmp struct {
-	UtType    int16      // Type of login.
-	UtPid     int32      // Process ID of login process.
-	UtLine    [32]byte   // Devicename.
-	UtID      [4]byte    // Inittab ID.
-	UtUser    [32]byte   // Username.
-	UtHost    [256]byte  // Hostname for remote login.
-	UtExit    exitStatus // Exit status of a process marked
-	UtSession int32      // Session ID, used for windowing.
-	UtTv      timeval    // Time entry was made.
-	UtAddrV6  [16]byte   // Internet address of remote host.
-	Unused    [20]byte   // Reserved for future use. // original is 20
+	Type    int16      // Type of login.
+	Pid     int32      // Process ID of login process.
+	Line    [32]byte   // Devicename.
+	ID      [4]byte    // Inittab ID.
+	User    [32]byte   // Username.
+	Host    [256]byte  // Hostname for remote login.
+	Exit    exitStatus // Exit status of a process marked
+	Session int32      // Session ID, used for windowing.
+	Tv      timeval    // Time entry was made.
+	AddrV6  [16]byte   // Internet address of remote host.
+	Unused  [20]byte   // Reserved for future use. // original is 20
 }
diff --git a/host/types_linux.go b/host/types_linux.go
new file mode 100644
index 0000000..9285455
--- /dev/null
+++ b/host/types_linux.go
@@ -0,0 +1,45 @@
+// +build ignore
+
+/*
+Input to cgo -godefs.
+*/
+
+package host
+
+/*
+#define KERNEL
+#include <sys/types.h>
+#include <utmp.h>
+
+enum {
+	sizeofPtr = sizeof(void*),
+};
+
+*/
+import "C"
+
+// Machine characteristics; for internal use.
+
+const (
+	sizeofPtr      = C.sizeofPtr
+	sizeofShort    = C.sizeof_short
+	sizeofInt      = C.sizeof_int
+	sizeofLong     = C.sizeof_long
+	sizeofLongLong = C.sizeof_longlong
+)
+
+// Basic types
+
+type (
+	_C_short     C.short
+	_C_int       C.int
+	_C_long      C.long
+	_C_long_long C.longlong
+)
+
+type utmp C.struct_utmp
+type exit_status C.struct_exit_status
+type UtTv struct {
+	TvSec  int32
+	TvUsec int32
+}