diff --git a/src/i-properties-provider.vala b/src/i-properties-provider.vala
index 2f134e6a79b8ecbc27ba42a4db5c61adb063fe2a..ab9af187d857407bfb20629302051eb4b5efd911 100644
--- a/src/i-properties-provider.vala
+++ b/src/i-properties-provider.vala
@@ -113,7 +113,9 @@ public SizeProperty (string          name,
                          uint64          step,
                          FormatSizeFlags format_flags) {
         var box = new Gtk.Box (Gtk.Orientation.HORIZONTAL, 0);
-        var name_label = new Gtk.Label.with_mnemonic (name);
+        var bold_name = "<span font-weight=\"bold\">" + name + "</span>";
+        var name_label = new Gtk.Label.with_mnemonic (bold_name);
+        name_label.set_use_markup(true);
         name_label.halign = Gtk.Align.START;
         name_label.get_style_context ().add_class ("dim-label");
         box.add (name_label);