diff --git a/dev/Styles/User/MessageView.less b/dev/Styles/User/MessageView.less
index 3f3909e4a..c23deddeb 100644
--- a/dev/Styles/User/MessageView.less
+++ b/dev/Styles/User/MessageView.less
@@ -372,6 +372,7 @@ html.rl-no-preview-pane {
 
 			img {
 				max-width: 90vw;
+				height: auto;
 			}
 			img[data-x-src]:not([src]) {
 				border: 1px solid #999;