diff --git a/config.default.yaml b/config.default.yaml
index b2fa5f6b..78a07e17 100644
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -263,6 +263,7 @@ sector:
   biomass_transport: false  # biomass transport between nodes
   conventional_generation: # generator : carrier
     OCGT: gas
+  biomass_to_liquid: true
 
 
 industry: