diff --git a/parts/server.py b/parts/server.py
index c0fc844..da10af1 100644
--- a/parts/server.py
+++ b/parts/server.py
@@ -228,7 +228,8 @@ def alter(partID):
         r = db_engine.execute(s, partno=request.form['partno'],
                                  description=request.form['description'],
                                  datasheet=datasheet_filename,
-                                 location_id=request.form['location_id'])
+                                 location_id=request.form['location_id'],
+                                 id=partID)
     return '{"status":"ok"}'
 
 @app.route('/parts/delete/<partID>')