diff --git a/metricflow/sql/render/big_query.py b/metricflow/sql/render/big_query.py
index 5745ab2f8..186f23110 100644
--- a/metricflow/sql/render/big_query.py
+++ b/metricflow/sql/render/big_query.py
@@ -184,8 +184,8 @@ def visit_add_time_expr(self, node: SqlAddTimeExpression) -> SqlExpressionRender
         count = node.count_expr.accept(self)
 
         return SqlExpressionRenderResult(
-            sql=f"DATE_ADD(CAST({column.sql} AS {self.timestamp_data_type}), INTERVAL {count} {node.granularity.value})",
-            bind_parameter_set=column.bind_parameter_set,
+            sql=f"DATE_ADD(CAST({column.sql} AS {self.timestamp_data_type}), INTERVAL {count.sql} {node.granularity.value})",
+            bind_parameter_set=column.bind_parameter_set.merge(count.bind_parameter_set),
         )
 
     @override
diff --git a/metricflow/sql/render/postgres.py b/metricflow/sql/render/postgres.py
index 92e910eb1..f5a4a8858 100644
--- a/metricflow/sql/render/postgres.py
+++ b/metricflow/sql/render/postgres.py
@@ -76,7 +76,7 @@ def visit_add_time_expr(self, node: SqlAddTimeExpression) -> SqlExpressionRender
         count_sql = f"({count_rendered.sql})" if count_expr.requires_parenthesis else count_rendered.sql
 
         return SqlExpressionRenderResult(
-            sql=f"{arg_rendered.sql} + MAKE_INTERVAL({granularity.value}s => {count_sql})",
+            sql=f"{arg_rendered.sql} + MAKE_INTERVAL({granularity.value}s => CAST ({count_sql} AS INTEGER))",
             bind_parameter_set=SqlBindParameterSet.merge_iterable(
                 (arg_rendered.bind_parameter_set, count_rendered.bind_parameter_set)
             ),