diff --git a/plugins/pingfed/pingfed.py b/plugins/pingfed/pingfed.py
index e6984ca..3b0c879 100644
--- a/plugins/pingfed/pingfed.py
+++ b/plugins/pingfed/pingfed.py
@@ -59,6 +59,10 @@ def pingfed_authenticate(url, username, password, useragent, pluginargs):
         page = BeautifulSoup(resp.text, features="html.parser")
         action = page.find('form').get('action')
 
+        # Get pf.adapterId
+        adapterId = page.find(id='pf.adapterId').get('value')
+        params_data['pf.adapterId'] = adapterId
+
         # Auth attempt
         resp = sess.post(f"{url}{action}", headers=headers, params=params_data, data=post_data, allow_redirects=False) 
         page = BeautifulSoup(resp.text, features="html.parser")