diff --git a/types/reactstrap/lib/Col.d.ts b/types/reactstrap/lib/Col.d.ts
index 33a207d329..ca93541104 100644
--- a/types/reactstrap/lib/Col.d.ts
+++ b/types/reactstrap/lib/Col.d.ts
@@ -10,6 +10,8 @@ export type ColumnProps
   };
 
 interface Props {
+  className?: string;
+
   xs?: ColumnProps;
   sm?: ColumnProps;
   md?: ColumnProps;