diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker
index cc6fb3b4df..63d3fc5d55 100644
--- a/contrib/completion/bash/docker
+++ b/contrib/completion/bash/docker
@@ -975,6 +975,11 @@ _docker_ps() {
 	esac
 
 	case "${words[$cword-2]}$prev=" in
+		*ancestor=*)
+			cur="${cur#=}"
+			__docker_images
+			return
+			;;
 		*id=*)
 			cur="${cur#=}"
 			__docker_container_ids