diff --git a/mindsdb_sql/render/sqlalchemy_render.py b/mindsdb_sql/render/sqlalchemy_render.py
index fd604b3..be8ac49 100644
--- a/mindsdb_sql/render/sqlalchemy_render.py
+++ b/mindsdb_sql/render/sqlalchemy_render.py
@@ -539,13 +539,18 @@ def prepare_create_table(self, ast_query):
                 col.is_primary_key = True
                 col.type = 'INT'
 
+            kwargs = {
+                'primary_key': col.is_primary_key,
+                'server_default': default,
+            }
+            if col.nullable is not None:
+                kwargs['nullable'] = col.nullable
+
             columns.append(
                 sa.Column(
                     col.name,
                     self.get_type(col.type),
-                    primary_key=col.is_primary_key,
-                    server_default=default,
-                    nullable=col.nullable
+                    **kwargs
                 )
             )