diff --git a/js/ui/osdWindow.js b/js/ui/osdWindow.js
index 773960c9e..199899fe0 100644
--- a/js/ui/osdWindow.js
+++ b/js/ui/osdWindow.js
@@ -66,6 +66,7 @@ const LevelBar = new Lang.Class({
         cr.arc(radius, h - radius, radius, 0.5 * Math.PI, Math.PI);
         cr.arc(radius, radius, radius, Math.PI, 1.5 * Math.PI);
         cr.fill();
+        cr.$dispose();
     }
 });
 
diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index 93dc81269..c0e58b379 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -413,6 +413,7 @@ const Arrow = new Lang.Class({
         cr.lineTo(w/2, thickness);
         cr.lineTo(w - thickness / 2, h - thickness / 2);
         cr.stroke();
+        cr.$dispose();
     },
 
     vfunc_style_changed: function() {