diff --git a/data/gtk/window.blp b/data/gtk/window.blp
index 99f31d0..7ea8e64 100644
--- a/data/gtk/window.blp
+++ b/data/gtk/window.blp
@@ -85,6 +85,7 @@ template $CartridgesWindow : Adw.ApplicationWindow {
                   Button {
                     icon-name: "sidebar-show-symbolic";
                     action-name: "win.show_sidebar";
+                    tooltip-text: _("Toggle Sidebar");
                   }
                 }
 
@@ -159,6 +160,7 @@ template $CartridgesWindow : Adw.ApplicationWindow {
                   Button show_sidebar_button {
                     icon-name: "sidebar-show-symbolic";
                     action-name: "win.show_sidebar";
+                    tooltip-text: _("Toggle Sidebar");
                   }
                 }