diff --git a/lib/ansible/runner/action_plugins/assemble.py b/lib/ansible/runner/action_plugins/assemble.py
index 741053f4cf0..d99d202e246 100644
--- a/lib/ansible/runner/action_plugins/assemble.py
+++ b/lib/ansible/runner/action_plugins/assemble.py
@@ -21,6 +21,7 @@ import os.path
 import pipes
 import shutil
 import tempfile
+import base64
 from ansible import utils
 from ansible.runner.return_data import ReturnData