diff --git a/daemon/graphdriver/devmapper/deviceset.go b/daemon/graphdriver/devmapper/deviceset.go
index b3d3c6d69f..c2488faa10 100644
--- a/daemon/graphdriver/devmapper/deviceset.go
+++ b/daemon/graphdriver/devmapper/deviceset.go
@@ -1786,7 +1786,7 @@ func (devices *DeviceSet) UnmountDevice(hash string) error {
 	return nil
 }
 
-// HasDevice returns true if the device is in the hash and mounted.
+// HasDevice returns true if the device metadata exists.
 func (devices *DeviceSet) HasDevice(hash string) bool {
 	devices.Lock()
 	defer devices.Unlock()
diff --git a/daemon/graphdriver/devmapper/driver.go b/daemon/graphdriver/devmapper/driver.go
index 67657f65e7..dc2647d11d 100644
--- a/daemon/graphdriver/devmapper/driver.go
+++ b/daemon/graphdriver/devmapper/driver.go
@@ -196,7 +196,7 @@ func (d *Driver) Put(id string) error {
 	return err
 }
 
-// Exists checks to see if the device is mounted.
+// Exists checks to see if the device exists.
 func (d *Driver) Exists(id string) bool {
 	return d.DeviceSet.HasDevice(id)
 }