diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker
index 79209c2941..5d8bd9c16e 100644
--- a/contrib/completion/bash/docker
+++ b/contrib/completion/bash/docker
@@ -4322,7 +4322,7 @@ _docker_system_prune() {
 
 	case "$cur" in
 		-*)
-			COMPREPLY=( $( compgen -W "--all -a --force -f --filter --help" -- "$cur" ) )
+			COMPREPLY=( $( compgen -W "--all -a --force -f --filter --help --volumes" -- "$cur" ) )
 			;;
 	esac
 }