diff --git a/res/css/views/messages/_ViewSourceEvent.scss b/res/css/views/messages/_ViewSourceEvent.scss
index 5e288eb19ac..55b0b86d927 100644
--- a/res/css/views/messages/_ViewSourceEvent.scss
+++ b/res/css/views/messages/_ViewSourceEvent.scss
@@ -19,8 +19,10 @@ limitations under the License.
     opacity: 0.6;
     font-size: $font-12px;
     width: 100%;
+    overflow-x: auto; // Cancel overflow setting of .mx_EventTile_content
 
-    pre, code {
+    pre,
+    code {
         flex: 1;
     }