--- panel-plugin/plugin.cpp.orig	2015-03-05 18:00:32.140610460 +0100
+++ panel-plugin/plugin.cpp	2015-03-05 18:45:19.989007731 +0100
@@ -431,7 +431,15 @@
 	gint icon_width_max = (mode == XFCE_PANEL_PLUGIN_MODE_HORIZONTAL) ?
 			6 * row_size - border :
 			size - border;
-	gint icon_height_max = row_size - border;
+	gint icon_height_max;
+	if (mode == XFCE_PANEL_PLUGIN_MODE_DESKBAR)
+	{
+		icon_height_max = icon_width_max - border;
+	}
+	else
+	{
+		icon_height_max = row_size - border;
+	}
 	GdkPixbuf* icon = xfce_panel_pixbuf_from_source_at_size(
 			wm_settings->button_icon_name.c_str(),
 			icon_theme,