diff --git a/docs/src/pages/component-demos/dialogs/FullScreenDialog.js b/docs/src/pages/component-demos/dialogs/FullScreenDialog.js
index 1925c436106b3b..6b82d31266d273 100644
--- a/docs/src/pages/component-demos/dialogs/FullScreenDialog.js
+++ b/docs/src/pages/component-demos/dialogs/FullScreenDialog.js
@@ -18,9 +18,6 @@ const styleSheet = createStyleSheet('FullScreenDialog', {
   appBar: {
     position: 'relative',
   },
-  paper: {
-    margin: 0,
-  },
   flex: {
     flex: 1,
   },
@@ -45,9 +42,6 @@ class FullScreenDialog extends Component {
       <div>
         <Button onClick={this.handleOpen}>Open full-screen dialog</Button>
         <Dialog
-          classes={{
-            paper: classes.paper,
-          }}
           fullScreen
           open={this.state.open}
           onRequestClose={this.handleRequestClose}
diff --git a/src/Dialog/Dialog.js b/src/Dialog/Dialog.js
index ef82285cf3d696..0e738ee4f75272 100644
--- a/src/Dialog/Dialog.js
+++ b/src/Dialog/Dialog.js
@@ -38,6 +38,7 @@ export const styleSheet = createStyleSheet('MuiDialog', theme => ({
     maxWidth: theme.breakpoints.getWidth('md'),
   },
   fullScreen: {
+    margin: 0,
     width: '100%',
     maxWidth: '100%',
     height: '100%',