diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker
index 990934b610..27e74226c0 100644
--- a/contrib/completion/bash/docker
+++ b/contrib/completion/bash/docker
@@ -4706,7 +4706,7 @@ _docker_trust_revoke() {
 _docker_trust_sign() {
 	case "$cur" in
 		-*)
-			COMPREPLY=( $( compgen -W "--help" -- "$cur" ) )
+			COMPREPLY=( $( compgen -W "--help --local" -- "$cur" ) )
 			;;
 		*)
 			local counter=$(__docker_pos_first_nonflag)