diff --git a/configs/trip_mode_choice.yaml b/configs/trip_mode_choice.yaml
index cc9c517..aeee99c 100644
--- a/configs/trip_mode_choice.yaml
+++ b/configs/trip_mode_choice.yaml
@@ -206,6 +206,3 @@ TOURS_MERGED_CHOOSER_COLUMNS:
 
 
 MODE_CHOICE_LOGSUM_COLUMN_NAME: mode_choice_logsum
-
-compute_settings:
-  fastmath: false
diff --git a/ext-configs/tour_mode_choice.yaml b/ext-configs/tour_mode_choice.yaml
index 19f5014..6550c28 100644
--- a/ext-configs/tour_mode_choice.yaml
+++ b/ext-configs/tour_mode_choice.yaml
@@ -196,3 +196,6 @@ LOGSUM_CHOOSER_COLUMNS:
 
 
 MODE_CHOICE_LOGSUM_COLUMN_NAME: mode_choice_logsum
+
+compute_settings:
+  fastmath: false  # use of isnan in utility functions requires fastmath=False