diff --git a/packages/material-ui/src/SwipeableDrawer/SwipeableDrawer.js b/packages/material-ui/src/SwipeableDrawer/SwipeableDrawer.js
index 17d8b6388bed03..cfc72d5bc87a36 100644
--- a/packages/material-ui/src/SwipeableDrawer/SwipeableDrawer.js
+++ b/packages/material-ui/src/SwipeableDrawer/SwipeableDrawer.js
@@ -574,7 +574,7 @@ SwipeableDrawer.propTypes = {
    */
   hideBackdrop: PropTypes.bool,
   /**
-   * Affects how far the drawer must be opened/closed to change his state.
+   * Affects how far the drawer must be opened/closed to change its state.
    * Specified as percent (0-1) of the width of the drawer
    */
   hysteresis: PropTypes.number,