diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker
index 813f2b6ccc..c44d027c3a 100644
--- a/contrib/completion/bash/docker
+++ b/contrib/completion/bash/docker
@@ -4478,6 +4478,7 @@ _docker() {
 	)
 
 	local legacy_commands=(
+		attach
 		commit
 		cp
 		create