diff --git a/eval.py b/eval.py
index ba27375f9..c7ea2e4f9 100644
--- a/eval.py
+++ b/eval.py
@@ -141,7 +141,7 @@ def _model_call(self, inps):
             )
         )
         x = seq.index_select(0, input_pos).view(1, -1)
-        with measure_time(message=None as measure:
+        with measure_time(message=None) as measure:
             logits = model_forward(self._model, x, input_pos)
         self.times.append(measure.time())
         return logits