diff --git a/app/assets/stylesheets/common/base/topic-post.scss b/app/assets/stylesheets/common/base/topic-post.scss
index 37ce8a326d1..4ca310e6c4f 100644
--- a/app/assets/stylesheets/common/base/topic-post.scss
+++ b/app/assets/stylesheets/common/base/topic-post.scss
@@ -191,6 +191,7 @@ $quote-share-maxwidth: 150px;
 
   img:not(.thumbnail):not(.ytp-thumbnail-image):not(.emoji) {
     max-width: 100%;
+    height: auto;
   }
 }