diff --git a/contrib/completion/zsh/_docker b/contrib/completion/zsh/_docker
index 6e0c55b4dd..4150a85fe9 100644
--- a/contrib/completion/zsh/_docker
+++ b/contrib/completion/zsh/_docker
@@ -1931,6 +1931,7 @@ __docker_service_commands() {
         "logs:Fetch the logs of a service or task"
         "ls:List services"
         "rm:Remove one or more services"
+        "rollback:Revert changes to a service's configuration"
         "scale:Scale one or multiple replicated services"
         "ps:List the tasks of a service"
         "update:Update a service"
@@ -2037,6 +2038,13 @@ __docker_service_subcommand() {
                 $opts_help \
                 "($help -)*:service:__docker_complete_services" && ret=0
             ;;
+        (rollback)
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help -d --detach)"{-d=false,--detach=false}"[Disable detached mode]" \
+                "($help -q --quiet)"{-q,--quiet}"[Suppress progress output]" \
+                "($help -)*:service:__docker_complete_services" && ret=0
+            ;;
         (scale)
             _arguments $(__docker_arguments) \
                 $opts_help \