diff --git a/data/theme/gnome-shell-sass/widgets/_screenshot.scss b/data/theme/gnome-shell-sass/widgets/_screenshot.scss
index f7fa3da2b..150f273b4 100644
--- a/data/theme/gnome-shell-sass/widgets/_screenshot.scss
+++ b/data/theme/gnome-shell-sass/widgets/_screenshot.scss
@@ -98,6 +98,7 @@ $screenshot_ui_button_red: $error_color;
   &:hover, &:focus { background-color: lighten($osd_bg_color, 10%);}
   &:active { background-color: lighten($active_bg_color,5%);}
   &:checked { background-color: white;color: black;}
+  &:insensitive { color: transparentize($osd_fg_color, 0.5);}
 
   border-radius: $modal_radius - $screenshot_ui_shot_cast_spacing;
 
diff --git a/js/ui/screenshot.js b/js/ui/screenshot.js
index 931f95831..d82d7a7a6 100644
--- a/js/ui/screenshot.js
+++ b/js/ui/screenshot.js
@@ -1021,8 +1021,6 @@ var ScreenshotUI = GObject.registerClass({
 
         this._lockdownSettings = new Gio.Settings({ schema_id: 'org.gnome.desktop.lockdown' });
 
-        Main.sessionMode.connect('updated', () => this.close(true));
-
         // The full-screen screenshot has a separate container so that we can
         // show it without the screenshot UI fade-in for a nicer animation.
         this._stageScreenshotContainer = new St.Widget({ visible: false });
@@ -1343,6 +1341,15 @@ var ScreenshotUI = GObject.registerClass({
                 }
             }
         );
+
+        Main.sessionMode.connect('updated',
+            () => this._sessionUpdated());
+        this._sessionUpdated();
+    }
+
+    _sessionUpdated() {
+        this.close(true);
+        this._castButton.reactive = Main.sessionMode.allowScreencast;
     }
 
     _refreshButtonLayout() {