diff --git a/core/misc/dialog/off-canvas.css b/core/misc/dialog/off-canvas.css
index 52a8b9e0791aa559cf47f34ede4293bed649f1b2..c5e6a1d7fb987079247535a619397a8bbb2a1031 100644
--- a/core/misc/dialog/off-canvas.css
+++ b/core/misc/dialog/off-canvas.css
@@ -30,7 +30,7 @@
 
 /* Wrap the form that's inside the off-canvas dialog. */
 .ui-dialog-off-canvas #drupal-off-canvas {
-  padding: 0 20px;
+  padding: 0 20px 20px;
   /* Prevent horizontal scrollbar. */
   overflow-x: hidden;
   overflow-y: auto;
diff --git a/core/themes/stable/css/core/dialog/off-canvas.css b/core/themes/stable/css/core/dialog/off-canvas.css
index 52a8b9e0791aa559cf47f34ede4293bed649f1b2..c5e6a1d7fb987079247535a619397a8bbb2a1031 100644
--- a/core/themes/stable/css/core/dialog/off-canvas.css
+++ b/core/themes/stable/css/core/dialog/off-canvas.css
@@ -30,7 +30,7 @@
 
 /* Wrap the form that's inside the off-canvas dialog. */
 .ui-dialog-off-canvas #drupal-off-canvas {
-  padding: 0 20px;
+  padding: 0 20px 20px;
   /* Prevent horizontal scrollbar. */
   overflow-x: hidden;
   overflow-y: auto;