diff --git a/types/material-ui/index.d.ts b/types/material-ui/index.d.ts
index ec7ad246b4..154be283de 100644
--- a/types/material-ui/index.d.ts
+++ b/types/material-ui/index.d.ts
@@ -1702,6 +1702,7 @@ declare namespace __MaterialUI {
 
             // useful attributes passed to <td/>
             colSpan?: number;
+            rowSpan?: number;
         }
         export class TableRowColumn extends React.Component<TableRowColumnProps> {
         }
@@ -1732,6 +1733,7 @@ declare namespace __MaterialUI {
 
             // useful attributes passed to <th/>
             colSpan?: number;
+            rowSpan?: number;
         }
         export class TableHeaderColumn extends React.Component<TableHeaderColumnProps> {
         }