diff --git a/extensions/api/util.py b/extensions/api/util.py
index 9c6dd30e..59a015de 100644
--- a/extensions/api/util.py
+++ b/extensions/api/util.py
@@ -17,6 +17,8 @@ def build_parameters(body, chat=False):
         'typical_p': float(body.get('typical_p', body.get('typical', 1))),
         'epsilon_cutoff': float(body.get('epsilon_cutoff', 0)),
         'eta_cutoff': float(body.get('eta_cutoff', 0)),
+        'tfs': float(body.get('tfs', 1)),
+        'top_a': float(body.get('top_a', 0)),
         'repetition_penalty': float(body.get('repetition_penalty', body.get('rep_pen', 1.1))),
         'encoder_repetition_penalty': float(body.get('encoder_repetition_penalty', 1.0)),
         'top_k': int(body.get('top_k', 0)),