diff --git a/app/assets/stylesheets/desktop/topic.scss b/app/assets/stylesheets/desktop/topic.scss
index 1d7367662f3..c27ec67aef8 100644
--- a/app/assets/stylesheets/desktop/topic.scss
+++ b/app/assets/stylesheets/desktop/topic.scss
@@ -155,10 +155,7 @@ a:hover.reply-new {
   height: 34px;
 
   /* as a big ol' click target, don't let text inside be selected */
-  -webkit-user-select: none;
-  -moz-user-select: none;
-  -ms-user-select: none;
-  user-select: none;
+  @include unselectable;
 
   &:hover {
     cursor: pointer;
diff --git a/app/assets/stylesheets/mobile/topic.scss b/app/assets/stylesheets/mobile/topic.scss
index 61dfe6fe835..4c6cb2c8bcc 100644
--- a/app/assets/stylesheets/mobile/topic.scss
+++ b/app/assets/stylesheets/mobile/topic.scss
@@ -108,10 +108,7 @@
   height: 34px;
 
   /* as a big ol' click target, don't let text inside be selected */
-  -webkit-user-select: none;
-  -moz-user-select: none;
-  -ms-user-select: none;
-  user-select: none;
+  @include unselectable;
 
   .nums {
     position: relative;