diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index 246d19a969..6f038dc27b 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -1307,7 +1307,7 @@ ARDOUR_UI::update_cpu_load ()
 	   should also be changed.
 	*/
 
-	float const c = AudioEngine::instance()->get_dsp_load ();
+	double const c = AudioEngine::instance()->get_dsp_load ();
 	snprintf (buf, sizeof (buf), _("DSP: <span foreground=\"%s\">%5.1f%%</span>"), c >= 90 ? X_("red") : X_("green"), c);
 	cpu_load_label.set_markup (buf);
 }