diff --git a/app/assets/stylesheets/desktop/topic.scss b/app/assets/stylesheets/desktop/topic.scss
index dcc263354..1d7367662 100644
--- a/app/assets/stylesheets/desktop/topic.scss
+++ b/app/assets/stylesheets/desktop/topic.scss
@@ -156,9 +156,8 @@ a:hover.reply-new {
 
   /* as a big ol' click target, don't let text inside be selected */
   -webkit-user-select: none;
-  -khtml-user-select: none;
   -moz-user-select: none;
-  -o-user-select: none;
+  -ms-user-select: none;
   user-select: none;
 
   &:hover {
diff --git a/app/assets/stylesheets/mobile/topic.scss b/app/assets/stylesheets/mobile/topic.scss
index 5a6767d10..61dfe6fe8 100644
--- a/app/assets/stylesheets/mobile/topic.scss
+++ b/app/assets/stylesheets/mobile/topic.scss
@@ -109,9 +109,8 @@
 
   /* as a big ol' click target, don't let text inside be selected */
   -webkit-user-select: none;
-  -khtml-user-select: none;
   -moz-user-select: none;
-  -o-user-select: none;
+  -ms-user-select: none;
   user-select: none;
 
   .nums {