@@ -13,6 +13,7 @@ import (

 	containertypes "github.com/docker/docker/api/types/container"

 	mounttypes "github.com/docker/docker/api/types/mount"

 	"github.com/docker/docker/pkg/chrootarchive"

+	"github.com/docker/docker/pkg/mount"

 	"github.com/docker/docker/pkg/stringid"

 	"github.com/docker/docker/pkg/symlink"

 	"github.com/docker/docker/pkg/system"

@@ -220,7 +221,9 @@ func (container *Container) UnmountIpcMounts(unmount func(pth string) error) {

 			warnings = append(warnings, err.Error())

 		} else if shmPath != "" {

 			if err := unmount(shmPath); err != nil && !os.IsNotExist(err) {

-				warnings = append(warnings, fmt.Sprintf("failed to umount %s: %v", shmPath, err))

+				if mounted, mErr := mount.Mounted(shmPath); mounted || mErr != nil {

+					warnings = append(warnings, fmt.Sprintf("failed to umount %s: %v", shmPath, err))

+				}

 			}

 		}