diff --git a/app/javascript/mastodon/features/ui/components/columns_area.js b/app/javascript/mastodon/features/ui/components/columns_area.js
index f00b74dfd..a01e5a390 100644
--- a/app/javascript/mastodon/features/ui/components/columns_area.js
+++ b/app/javascript/mastodon/features/ui/components/columns_area.js
@@ -37,6 +37,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
   static propTypes = {
     intl: PropTypes.object.isRequired,
     columns: ImmutablePropTypes.list.isRequired,
+    isModalOpen: PropTypes.bool.isRequired,
     singleColumn: PropTypes.bool,
     children: PropTypes.node,
   };
@@ -144,7 +145,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
   }
 
   render () {
-    const { columns, children, singleColumn } = this.props;
+    const { columns, children, singleColumn, isModalOpen } = this.props;
     const { shouldAnimate } = this.state;
 
     const columnIndex = getIndex(this.context.router.history.location.pathname);
@@ -159,7 +160,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
     }
 
     return (
-      <div className='columns-area' ref={this.setRef}>
+      <div className={`columns-area ${ isModalOpen ? 'unscrollable' : '' }`} ref={this.setRef}>
         {columns.map(column => {
           const params = column.get('params', null) === null ? null : column.get('params').toJS();
 
diff --git a/app/javascript/mastodon/features/ui/containers/columns_area_container.js b/app/javascript/mastodon/features/ui/containers/columns_area_container.js
index 95f95618b..f3e82a8ac 100644
--- a/app/javascript/mastodon/features/ui/containers/columns_area_container.js
+++ b/app/javascript/mastodon/features/ui/containers/columns_area_container.js
@@ -3,6 +3,7 @@ import ColumnsArea from '../components/columns_area';
 
 const mapStateToProps = state => ({
   columns: state.getIn(['settings', 'columns']),
+  isModalOpen: !!state.get('modal').modalType,
 });
 
 export default connect(mapStateToProps, null, null, { withRef: true })(ColumnsArea);
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index e8adceb66..dbb277af9 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1613,6 +1613,10 @@
   justify-content: flex-start;
   overflow-x: auto;
   position: relative;
+
+  &.unscrollable {
+    overflow-x: hidden;
+  }
 }
 
 @media screen and (min-width: 360px) {