diff --git a/clapper_src/controls.js b/clapper_src/controls.js
index 9f33251f..7bc85b9d 100644
--- a/clapper_src/controls.js
+++ b/clapper_src/controls.js
@@ -24,8 +24,8 @@ var Controls = GObject.registerClass({
     _init()
     {
         super._init({
-            margin_left: CONTROLS_MARGIN,
-            margin_right: CONTROLS_MARGIN,
+            margin_start: CONTROLS_MARGIN,
+            margin_end: CONTROLS_MARGIN,
             spacing: CONTROLS_SPACING,
             valign: Gtk.Align.END,
         });
diff --git a/clapper_src/revealers.js b/clapper_src/revealers.js
index 7b6ad082..020e2d57 100644
--- a/clapper_src/revealers.js
+++ b/clapper_src/revealers.js
@@ -158,13 +158,13 @@ class ClapperRevealerTop extends CustomRevealer
             ellipsize: Pango.EllipsizeMode.END,
             expand: true,
             margin_top: 14,
-            margin_left: 12,
+            margin_start: 12,
             xalign: 0,
             yalign: 0,
         });
 
         let timeLabelOpts = {
-            margin_right: 10,
+            margin_end: 10,
             xalign: 1,
             yalign: 0,
         };