diff --git a/configs/resident/tour_mode_choice.yaml b/configs/resident/tour_mode_choice.yaml
index 7be6c6a..c35b382 100644
--- a/configs/resident/tour_mode_choice.yaml
+++ b/configs/resident/tour_mode_choice.yaml
@@ -112,3 +112,6 @@ LOGSUM_CHOOSER_COLUMNS:
   - transit_pass_ownership
 
 MODE_CHOICE_LOGSUM_COLUMN_NAME: mode_choice_logsum
+
+compute_settings:
+  fastmath: false  # use of isnan in utility functions requires fastmath=False