diff --git a/templates/repo/diff/box.tmpl b/templates/repo/diff/box.tmpl
index 9f3b271e24..9b0738b1b7 100644
--- a/templates/repo/diff/box.tmpl
+++ b/templates/repo/diff/box.tmpl
@@ -213,7 +213,7 @@
 											<a class="preview item" data-url="{{$.Repository.APIURL}}/markdown" data-context="{{$.RepoLink}}">{{$.i18n.Tr "preview"}}</a>
 									</div>
 									<div class="ui bottom attached active write tab segment">
-											<textarea tabindex="1" name="content"></textarea>
+											<textarea class="review-textarea" tabindex="1" name="content"></textarea>
 									</div>
 									<div class="ui bottom attached tab preview segment markdown">
 									{{$.i18n.Tr "loading"}}
diff --git a/web_src/js/index.js b/web_src/js/index.js
index f4f08b828c..3751c6d9e4 100644
--- a/web_src/js/index.js
+++ b/web_src/js/index.js
@@ -325,7 +325,7 @@ function initCommentForm() {
     return;
   }
 
-  setCommentSimpleMDE($('.comment.form textarea'));
+  setCommentSimpleMDE($('.comment.form textarea:not(.review-textarea)'));
   initBranchSelector();
   initCommentPreviewTab($('.comment.form'));
   initImagePaste($('.comment.form textarea'));