diff --git a/host/host_linux.go b/host/host_linux.go
index f56906c..14d0935 100644
--- a/host/host_linux.go
+++ b/host/host_linux.go
@@ -14,7 +14,6 @@ import (
 	"strconv"
 	"strings"
 	"time"
-	"unsafe"
 
 	"github.com/shirou/gopsutil/internal/common"
 )
@@ -108,14 +107,12 @@ func Users() ([]UserStat, error) {
 		return nil, err
 	}
 
-	u := utmp{}
-	entrySize := int(unsafe.Sizeof(u))
-	count := len(buf) / entrySize
+	count := len(buf) / sizeOfUtmp
 
 	ret := make([]UserStat, 0, count)
 
 	for i := 0; i < count; i++ {
-		b := buf[i*entrySize : i*entrySize+entrySize]
+		b := buf[i*sizeOfUtmp : (i+1)*sizeOfUtmp]
 
 		var u utmp
 		br := bytes.NewReader(b)
@@ -130,7 +127,7 @@ func Users() ([]UserStat, error) {
 			User:     common.IntToString(u.User[:]),
 			Terminal: common.IntToString(u.Line[:]),
 			Host:     common.IntToString(u.Host[:]),
-			Started:  int(u.Tv.TvSec),
+			Started:  int(u.Tv.Sec),
 		}
 		ret = append(ret, user)
 	}
diff --git a/host/host_linux_386.go b/host/host_linux_386.go
index cab9fee..79b5cb5 100644
--- a/host/host_linux_386.go
+++ b/host/host_linux_386.go
@@ -11,6 +11,7 @@ const (
 	sizeofInt      = 0x4
 	sizeofLong     = 0x4
 	sizeofLongLong = 0x8
+	sizeOfUtmp     = 0x180
 )
 
 type (
@@ -39,6 +40,6 @@ type exit_status struct {
 	Exit        int16
 }
 type UtTv struct {
-	TvSec  int32
-	TvUsec int32
+	Sec  int32
+	Usec int32
 }
diff --git a/host/host_linux_amd64.go b/host/host_linux_amd64.go
index 180394b..9a69652 100644
--- a/host/host_linux_amd64.go
+++ b/host/host_linux_amd64.go
@@ -9,6 +9,7 @@ const (
 	sizeofInt      = 0x4
 	sizeofLong     = 0x8
 	sizeofLongLong = 0x8
+	sizeOfUtmp     = 0x180
 )
 
 type (
@@ -23,12 +24,12 @@ type utmp struct {
 	Pad_cgo_0         [2]byte
 	Pid               int32
 	Line              [32]int8
-	ID                [4]int8
+	Id                [4]int8
 	User              [32]int8
 	Host              [256]int8
 	Exit              exit_status
 	Session           int32
-	Tv                UtTv
+	Tv                _Ctype_struct___0
 	Addr_v6           [4]int32
 	X__glibc_reserved [20]int8
 }
@@ -36,7 +37,12 @@ type exit_status struct {
 	Termination int16
 	Exit        int16
 }
-type UtTv struct {
-	TvSec  int32
-	TvUsec int32
+type timeval struct {
+	Sec  int64
+	Usec int64
+}
+
+type _Ctype_struct___0 struct {
+	Sec  int32
+	Usec int32
 }
diff --git a/host/host_linux_arm.go b/host/host_linux_arm.go
index 5f7e168..e2cf448 100644
--- a/host/host_linux_arm.go
+++ b/host/host_linux_arm.go
@@ -1,20 +1,21 @@
-// +build linux
-// +build arm
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_linux.go | sed "s/uint8/int8/g"
 
 package host
 
 const (
-	sizeofPtr      = 0x8
+	sizeofPtr      = 0x4
 	sizeofShort    = 0x2
 	sizeofInt      = 0x4
-	sizeofLong     = 0x8
+	sizeofLong     = 0x4
 	sizeofLongLong = 0x8
+	sizeOfUtmp     = 0x180
 )
 
 type (
 	_C_short     int16
 	_C_int       int32
-	_C_long      int64
+	_C_long      int32
 	_C_long_long int64
 )
 
@@ -23,12 +24,12 @@ type utmp struct {
 	Pad_cgo_0         [2]byte
 	Pid               int32
 	Line              [32]int8
-	ID                [4]int8
+	Id                [4]int8
 	User              [32]int8
 	Host              [256]int8
 	Exit              exit_status
 	Session           int32
-	Tv                UtTv
+	Tv                timeval
 	Addr_v6           [4]int32
 	X__glibc_reserved [20]int8
 }
@@ -36,7 +37,7 @@ type exit_status struct {
 	Termination int16
 	Exit        int16
 }
-type UtTv struct {
-	TvSec  int32
-	TvUsec int32
+type timeval struct {
+	Sec  int32
+	Usec int32
 }
diff --git a/host/types_linux.go b/host/types_linux.go
index 9285455..8adecb6 100644
--- a/host/types_linux.go
+++ b/host/types_linux.go
@@ -7,12 +7,11 @@ Input to cgo -godefs.
 package host
 
 /*
-#define KERNEL
 #include <sys/types.h>
 #include <utmp.h>
 
 enum {
-	sizeofPtr = sizeof(void*),
+       sizeofPtr = sizeof(void*),
 };
 
 */
@@ -26,6 +25,7 @@ const (
 	sizeofInt      = C.sizeof_int
 	sizeofLong     = C.sizeof_long
 	sizeofLongLong = C.sizeof_longlong
+	sizeOfUtmp     = C.sizeof_struct_utmp
 )
 
 // Basic types
@@ -39,7 +39,4 @@ type (
 
 type utmp C.struct_utmp
 type exit_status C.struct_exit_status
-type UtTv struct {
-	TvSec  int32
-	TvUsec int32
-}
+type timeval C.struct_timeval
diff --git a/internal/common/common.go b/internal/common/common.go
index d9dce5c..e190f4d 100644
--- a/internal/common/common.go
+++ b/internal/common/common.go
@@ -117,6 +117,23 @@ func IntToString(orig []int8) string {
 	return string(ret[0:size])
 }
 
+func UintToString(orig []uint8) string {
+        ret := make([]byte, len(orig))
+        size := -1
+        for i, o := range orig {
+                if o == 0 {
+                        size = i
+                        break
+                }
+                ret[i] = byte(o)
+        }
+        if size == -1 {
+                size = len(orig)
+        }
+
+        return string(ret[0:size])
+}
+
 func ByteToString(orig []byte) string {
 	n := -1
 	l := -1