diff --git a/res/css/views/messages/_MImageBody.scss b/res/css/views/messages/_MImageBody.scss
index bf483feda3..1c809f0743 100644
--- a/res/css/views/messages/_MImageBody.scss
+++ b/res/css/views/messages/_MImageBody.scss
@@ -15,6 +15,10 @@ limitations under the License.
 */
 
 .mx_MImageBody {
-  display: block;
-  margin-right: 34px;
+    display: block;
+    margin-right: 34px;
 }
+
+.mx_MImageBody_thumbnail {
+    max-width: 100%;
+}
\ No newline at end of file