diff --git a/zephyr/static/styles/zephyr.css b/zephyr/static/styles/zephyr.css
index d7b54703f4..525a65c187 100644
--- a/zephyr/static/styles/zephyr.css
+++ b/zephyr/static/styles/zephyr.css
@@ -1512,15 +1512,18 @@ li.expanded_subject {
     text-align: center;
 }
 
+#sticky-popover h1 {
+    text-align: center;
+}
+.done-button {
+    text-align: center;
+}
 .sticky-popover-inner {
     max-width: 300px;
 }
 .sticky-popover-inner p {
     padding-bottom: 5px;
 }
-#sticky_done {
-    text-align: center;
-}
 
 #feedback_section {
     text-align: center;
diff --git a/zephyr/static/templates/sticky_app_popover.handlebars b/zephyr/static/templates/sticky_app_popover.handlebars
index 3c64c1e2b3..94e44e901b 100644
--- a/zephyr/static/templates/sticky_app_popover.handlebars
+++ b/zephyr/static/templates/sticky_app_popover.handlebars
@@ -1,6 +1,6 @@
 {{! Contents of the "make the app sticky" onboarding popup }}
 
-<div>
+<div id="sticky-popover">
     <h1>Pin this tab!</h1>
 
     <p>Humbug works best when it's always open. Take a second to pin
@@ -20,7 +20,7 @@
        href="https://humbughq.com/apps">our apps page</a> for Mac,
        Linux, and Windows instructions.</p>
 
-    <div id="send_controls">
+    <div class="done-button">
         <input type="submit" id="sticky_done" value="Done" class="btn btn-big btn-primary" />
     </div>
 </div>