diff --git a/premise/iam_variables_mapping/transport_roadfreight_variables.yaml b/premise/iam_variables_mapping/transport_roadfreight_variables.yaml
index 07f1d483..bcf6be71 100644
--- a/premise/iam_variables_mapping/transport_roadfreight_variables.yaml
+++ b/premise/iam_variables_mapping/transport_roadfreight_variables.yaml
@@ -132,6 +132,7 @@ truck, fuel cell electric, 18t:
     fltr:
       - hydrogen
 
+
 truck, diesel, 18t:
   iam_aliases:
     remind: ES|Transport|Freight|Road|Truck (18t)|Liquids