diff --git a/cli/command/container/update.go b/cli/command/container/update.go
index 5bacc9be75..75765856c5 100644
--- a/cli/command/container/update.go
+++ b/cli/command/container/update.go
@@ -50,7 +50,7 @@ func NewUpdateCommand(dockerCli *command.DockerCli) *cobra.Command {
 	}
 
 	flags := cmd.Flags()
-	flags.Uint16Var(&opts.blkioWeight, "blkio-weight", 0, "Block IO (relative weight), between 10 and 1000")
+	flags.Uint16Var(&opts.blkioWeight, "blkio-weight", 0, "Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0)")
 	flags.Int64Var(&opts.cpuPeriod, "cpu-period", 0, "Limit CPU CFS (Completely Fair Scheduler) period")
 	flags.Int64Var(&opts.cpuQuota, "cpu-quota", 0, "Limit CPU CFS (Completely Fair Scheduler) quota")
 	flags.Int64Var(&opts.cpuRealtimePeriod, "cpu-rt-period", 0, "Limit the CPU real-time period in microseconds")
diff --git a/runconfig/opts/parse.go b/runconfig/opts/parse.go
index 8233bae287..0c3b3394a4 100644
--- a/runconfig/opts/parse.go
+++ b/runconfig/opts/parse.go
@@ -219,7 +219,7 @@ func AddFlags(flags *pflag.FlagSet) *ContainerOptions {
 	flags.BoolVar(&copts.noHealthcheck, "no-healthcheck", false, "Disable any container-specified HEALTHCHECK")
 
 	// Resource management
-	flags.Uint16Var(&copts.blkioWeight, "blkio-weight", 0, "Block IO (relative weight), between 10 and 1000")
+	flags.Uint16Var(&copts.blkioWeight, "blkio-weight", 0, "Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0)")
 	flags.Var(&copts.blkioWeightDevice, "blkio-weight-device", "Block IO weight (relative device weight)")
 	flags.StringVar(&copts.containerIDFile, "cidfile", "", "Write the container ID to the file")
 	flags.StringVar(&copts.cpusetCpus, "cpuset-cpus", "", "CPUs in which to allow execution (0-3, 0,1)")