diff --git a/dbt/include/trino/macros/adapters.sql b/dbt/include/trino/macros/adapters.sql
index 51743880..2228934e 100644
--- a/dbt/include/trino/macros/adapters.sql
+++ b/dbt/include/trino/macros/adapters.sql
@@ -90,7 +90,7 @@
 
 {% macro comment(comment) %}
   {%- set persist_docs = model['config'].get('persist_docs') -%}
-  {%- if persist_docs is not none -%}
+  {%- if persist_docs -%}
     {%- set persist_relation = persist_docs.get('relation') -%}
     {%- if persist_relation and comment is not none and comment|length > 0 -%}
         comment '{{ comment | replace("'", "''") }}'