diff --git a/rosidl_generator_c/resource/idl__description.c.em b/rosidl_generator_c/resource/idl__description.c.em
index 188b4488c..b304e83f9 100644
--- a/rosidl_generator_c/resource/idl__description.c.em
+++ b/rosidl_generator_c/resource/idl__description.c.em
@@ -89,6 +89,7 @@ TEMPLATE(
 TEMPLATE(
   'full__description.c.em',
   toplevel_type_description=toplevel_type_description,
-  implicit_type_descriptions=implicit_type_descriptions)
+  implicit_type_descriptions=implicit_type_descriptions,
+  hash_lookup=hash_lookup)
 }@
 @[end if]@