diff --git a/app/assets/stylesheets/desktop/topic-list.scss b/app/assets/stylesheets/desktop/topic-list.scss
index 4f3e940b3e8..e1a40bd2c9d 100644
--- a/app/assets/stylesheets/desktop/topic-list.scss
+++ b/app/assets/stylesheets/desktop/topic-list.scss
@@ -107,12 +107,12 @@
     min-width: 80px;
   }
   .posters {
-    min-width: 150px;
+    // we know there are up to 5 avatars of fixed size
+    // will be overridden by media width queries on narrow displays to 1 avatar's width
+    width: 145px;
+    min-width: 145px;
   }
-  .participants {
-    min-width: 85px;
-  }
-  .posters, .participants {
+  .posters {
     > a {
       float: left;
       margin-right: 4px;
diff --git a/app/assets/stylesheets/desktop/topic-post.scss b/app/assets/stylesheets/desktop/topic-post.scss
index a889c97026d..89c505f358f 100644
--- a/app/assets/stylesheets/desktop/topic-post.scss
+++ b/app/assets/stylesheets/desktop/topic-post.scss
@@ -349,11 +349,6 @@ a.star {
     line-height: 15px;
   }
 
-  p,
-  .participants {
-    margin: 0 0 7px;
-  }
-
   ul {
     margin: 0;
     list-style: none;
diff --git a/app/assets/stylesheets/mobile/topic-post.scss b/app/assets/stylesheets/mobile/topic-post.scss
index c605a3f2dc6..962691d38dc 100644
--- a/app/assets/stylesheets/mobile/topic-post.scss
+++ b/app/assets/stylesheets/mobile/topic-post.scss
@@ -171,11 +171,6 @@ a.star {
     line-height: 15px;
   }
 
-  p,
-  .participants {
-    margin: 0 0 7px;
-  }
-
   .user {
     float: left;
     margin-right: 10px;