add missing import in asyncion cookbook example

Change-Id: Idda470d2aa7df298e5553359be1ced07e2c112d0

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/build/cookbook.rst b/docs/build/cookbook.rst
index e464cc8..b5a4bb9 100644
--- a/docs/build/cookbook.rst
+++ b/docs/build/cookbook.rst
@@ -1455,7 +1455,9 @@ file that's used by Alembic to start its operations. In particular only
 ``run_migrations_online`` will need to be updated to be something like the example below::
 
     import asyncio
-    
+
+    from sqlalchemy.ext.asyncio import AsyncEngine
+
     # ... no change required to the rest of the code