diff --git a/contrib/completion/bash/docker b/contrib/completion/bash/docker
index ca8daa00c3..77fe494e76 100644
--- a/contrib/completion/bash/docker
+++ b/contrib/completion/bash/docker
@@ -4483,6 +4483,7 @@ _docker() {
 	)
 
 	local legacy_commands=(
+		attach
 		commit
 		cp
 		create