diff --git a/api/client/system/info.go b/api/client/system/info.go
index f11c021fb3..2381955b0f 100644
--- a/api/client/system/info.go
+++ b/api/client/system/info.go
@@ -48,7 +48,7 @@ func runInfo(dockerCli *client.DockerCli) error {
 
 			// print a warning if devicemapper is using a loopback file
 			if pair[0] == "Data loop file" {
-				fmt.Fprintln(dockerCli.Err(), " WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specifies a custom block storage device.")
+				fmt.Fprintln(dockerCli.Err(), " WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.")
 			}
 		}
 
diff --git a/docs/userguide/storagedriver/device-mapper-driver.md b/docs/userguide/storagedriver/device-mapper-driver.md
index fd8075313a..8b8822f847 100644
--- a/docs/userguide/storagedriver/device-mapper-driver.md
+++ b/docs/userguide/storagedriver/device-mapper-driver.md
@@ -440,7 +440,7 @@ Storage Driver: devicemapper
  Deferred Deletion Enabled: false
  Deferred Deleted Device Count: 0
  Data loop file: /var/lib/docker/devicemapper/devicemapper/data
- WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specifies a custom block storage device.
+ WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
  Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
  Library Version: 1.02.90 (2014-09-01)
 Logging Driver: json-file