diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
index 4a66b82cbb4f62e94acec041652b742be74d0fac..272e6293abc3542bf3d28e79d32a8cd9731b977d 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
@@ -225,7 +225,7 @@ def columns(table_name) # :nodoc:
             type_metadata = fetch_type_metadata(column_name, type, oid, fmod)
             default_value = extract_value_from_default(default)
             default_function = extract_default_function(default_value, default)
-            new_column(column_name, default_value, type_metadata, !notnull, table_name, default_function, collation, comment: comment)
+            new_column(column_name, default_value, type_metadata, !notnull, table_name, default_function, collation, comment: comment.presence)
           end
         end