diff --git a/extensions/mentions/js/forum/dist/extension.js b/extensions/mentions/js/forum/dist/extension.js
index 8e6668a7a..2785abf5f 100644
--- a/extensions/mentions/js/forum/dist/extension.js
+++ b/extensions/mentions/js/forum/dist/extension.js
@@ -1010,19 +1010,27 @@ System.register('flarum/mentions/components/PostQuoteButton', ['flarum/component
 
             $(document).on('mousedown', this.hide.bind(this));
           }
+        }, {
+          key: 'show',
+          value: function show(left, top) {
+            var $this = this.$().show();
+            var parentOffset = $this.offsetParent().offset();
+
+            $this.css('left', left - parentOffset.left).css('top', top - parentOffset.top);
+          }
         }, {
           key: 'showStart',
           value: function showStart(left, top) {
             var $this = this.$();
 
-            $this.show().css('left', left).css('top', $(window).scrollTop() + top - $this.outerHeight() - 5);
+            this.show(left, $(window).scrollTop() + top - $this.outerHeight() - 5);
           }
         }, {
           key: 'showEnd',
           value: function showEnd(right, bottom) {
             var $this = this.$();
 
-            $this.show().css('left', right - $this.outerWidth()).css('top', $(window).scrollTop() + bottom + 5);
+            this.show(right - $this.outerWidth(), $(window).scrollTop() + bottom + 5);
           }
         }, {
           key: 'hide',
diff --git a/extensions/mentions/js/forum/src/components/PostQuoteButton.js b/extensions/mentions/js/forum/src/components/PostQuoteButton.js
index 5ec66b6dc..cbd60d786 100644
--- a/extensions/mentions/js/forum/src/components/PostQuoteButton.js
+++ b/extensions/mentions/js/forum/src/components/PostQuoteButton.js
@@ -26,20 +26,25 @@ export default class PostQuoteButton extends Button {
     $(document).on('mousedown', this.hide.bind(this));
   }
 
+  show(left, top) {
+    const $this = this.$().show();
+    const parentOffset = $this.offsetParent().offset();
+
+    $this
+      .css('left', left - parentOffset.left)
+      .css('top', top - parentOffset.top);
+  }
+
   showStart(left, top) {
     const $this = this.$();
 
-    $this.show()
-      .css('left', left)
-      .css('top', $(window).scrollTop() + top - $this.outerHeight() - 5);
+    this.show(left, $(window).scrollTop() + top - $this.outerHeight() - 5);
   }
 
   showEnd(right, bottom) {
     const $this = this.$();
 
-    $this.show()
-      .css('left', right - $this.outerWidth())
-      .css('top', $(window).scrollTop() + bottom + 5)
+    this.show(right - $this.outerWidth(), $(window).scrollTop() + bottom + 5);
   }
 
   hide() {