diff --git a/core/misc/dialog/off-canvas.dropbutton.css b/core/misc/dialog/off-canvas.dropbutton.css
index 7211dce..1736bac 100644
--- a/core/misc/dialog/off-canvas.dropbutton.css
+++ b/core/misc/dialog/off-canvas.dropbutton.css
@@ -224,7 +224,7 @@
   background: transparent;
 }
 
-/* Prevent list item from expanding it's container. */
+/* Prevent list item from expanding its container. */
 #drupal-off-canvas td ul.dropbutton li.edit {
   width: 2em;
   height: 2em;
diff --git a/core/themes/stable/css/core/dialog/off-canvas.dropbutton.css b/core/themes/stable/css/core/dialog/off-canvas.dropbutton.css
index 99f5c61..6ceb4d3 100644
--- a/core/themes/stable/css/core/dialog/off-canvas.dropbutton.css
+++ b/core/themes/stable/css/core/dialog/off-canvas.dropbutton.css
@@ -224,7 +224,7 @@
   background: transparent;
 }
 
-/* Prevent list item from expanding it's container. */
+/* Prevent list item from expanding its container. */
 #drupal-off-canvas td ul.dropbutton li.edit {
   width: 2em;
   height: 2em;