diff --git a/.gitignore b/.gitignore
index 4b7bb656804..47a15282728 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,3 +35,6 @@ network_closure.sh
 
 # compiled binaries in third_party
 /third_party/pkg
+
+# also ignore etcd installed by hack/install-etcd.sh
+/third_party/etcd