diff --git a/app/assets/javascripts/discourse/templates/header.js.handlebars b/app/assets/javascripts/discourse/templates/header.js.handlebars
index e850f5fd803..cc809fb00cf 100644
--- a/app/assets/javascripts/discourse/templates/header.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/header.js.handlebars
@@ -10,6 +10,9 @@
             <a {{bind-attr class=":star topic.starred:starred"}} {{action toggleStar}} href='#' {{bind-attr title="topic.starTooltip"}}></a>
           {{/if}}
           <h1>
+            {{#if topic.isPrivateMessage}}
+              <span class="private-message-glyph"><i class='fa fa-envelope'></i></span>
+            {{/if}}
           {{#if topic.category.parentCategory}}
             {{boundCategoryLink topic.category.parentCategory}}
           {{/if}}
diff --git a/app/assets/javascripts/discourse/templates/topic.js.handlebars b/app/assets/javascripts/discourse/templates/topic.js.handlebars
index 912ef4cee19..92eb539185d 100644
--- a/app/assets/javascripts/discourse/templates/topic.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/topic.js.handlebars
@@ -19,6 +19,7 @@
             <button class='btn btn-small' {{action cancelEditingTopic}}><i class='fa fa-times'></i></button>
           {{else}}
             <h1>
+              <span class="private-message-glyph"><i class='fa fa-envelope'></i></span>
               {{#if category.parentCategory}}
                 {{boundCategoryLink category.parentCategory}}
               {{/if}}
diff --git a/app/assets/stylesheets/desktop/topic.scss b/app/assets/stylesheets/desktop/topic.scss
index ea8bf8061d8..387ac73b7a5 100644
--- a/app/assets/stylesheets/desktop/topic.scss
+++ b/app/assets/stylesheets/desktop/topic.scss
@@ -64,8 +64,12 @@
     .fa-thumb-tack { margin-top: -1px; }
   }
   .chzn-container { vertical-align: middle; }
+  .private-message-glyph { display: none; }
 }
 
+.private-message-glyph { color: lighten($primary_text_color, 60%); }
+.private_message #topic-title .private-message-glyph { display: inline; }
+
 #topic-closing-info {
   border-top: 1px solid lighten($primary_border_color, 10%) ;
   padding-top: 10px;
diff --git a/app/assets/stylesheets/mobile/topic.scss b/app/assets/stylesheets/mobile/topic.scss
index 48c00043414..151c5f95113 100644
--- a/app/assets/stylesheets/mobile/topic.scss
+++ b/app/assets/stylesheets/mobile/topic.scss
@@ -26,19 +26,19 @@
 
 #topic-title {
   margin-bottom: 20px;
-margin: 0 60px 10px 20px;
-line-height: 1.7em;
-
-h1 {
-  font-size: 1.5em;
-  margin:0;
-
-a.edit-topic {font-size: 15px;}
+  margin: 0 60px 10px 20px;
+  line-height: 1.7em;
 
+  h1 {
+    font-size: 1.5em;
+    margin:0;
+    a.edit-topic {font-size: 15px;}
+  }
+  .private-message-glyph { display: none; }
 }
 
-
-}
+.private-message-glyph { color: lighten($primary_text_color, 60%); }
+.private_message #topic-title .private-message-glyph { display: inline; }
 
 #topic-closing-info {
   margin-left: 10px;