diff --git a/pkg/drivers/common.go b/pkg/drivers/common.go
index 2fde2ef..8c5c98b 100644
--- a/pkg/drivers/common.go
+++ b/pkg/drivers/common.go
@@ -29,6 +29,7 @@ import (
 	"github.com/docker/machine/libmachine/ssh"
 	"github.com/golang/glog"
 	"github.com/pkg/errors"
+	"k8s.io/minikube/pkg/util"
 )
 
 // This file is for common code shared among internal machine drivers
@@ -74,7 +75,7 @@ func createRawDiskImage(sshKeyPath, diskPath string, diskSizeMb int) error {
 		return errors.Wrapf(err, "closing file %s", diskPath)
 	}
 
-	if err := os.Truncate(diskPath, int64(diskSizeMb*1000000)); err != nil {
+	if err := os.Truncate(diskPath, util.ConvertMBToBytes(diskSizeMb)); err != nil {
 		return errors.Wrap(err, "truncate")
 	}
 	return nil
diff --git a/pkg/drivers/common_test.go b/pkg/drivers/common_test.go
index cc250e0..14cc631 100644
--- a/pkg/drivers/common_test.go
+++ b/pkg/drivers/common_test.go
@@ -36,7 +36,7 @@ func Test_createDiskImage(t *testing.T) {
 	diskPath := filepath.Join(tmpdir, "disk")
 
 	sizeInMb := 100
-	sizeInBytes := int64(sizeInMb) * 1000000
+	sizeInBytes := int64(104857600)
 	if err := createRawDiskImage(sshPath, diskPath, sizeInMb); err != nil {
 		t.Errorf("createDiskImage() error = %v", err)
 	}