@@ -4168,9 +4168,15 @@ _docker_system() {

 }

 _docker_system_df() {

+	case "$prev" in

+		--format)

+			return

+			;;

+	esac

+

 	case "$cur" in

 		-*)

-			COMPREPLY=( $( compgen -W "--help --verbose -v" -- "$cur" ) )

+			COMPREPLY=( $( compgen -W "--format --help --verbose -v" -- "$cur" ) )

 			;;

 	esac

 }

@@ -21,8 +21,9 @@ Usage:	docker system df [OPTIONS]

 Show docker filesystem usage

 Options:

-      --help      Print usage

-  -v, --verbose   Show detailed information on space usage

+      --format string   Pretty-print images using a Go template

+      --help            Print usage

+  -v, --verbose         Show detailed information on space usage

 ```

 ## Description