diff --git a/libs/gtkmm2ext/waves_fastmeter.cc b/libs/gtkmm2ext/waves_fastmeter.cc
index b57c63fe98..fa8cba9f7b 100644
--- a/libs/gtkmm2ext/waves_fastmeter.cc
+++ b/libs/gtkmm2ext/waves_fastmeter.cc
@@ -569,6 +569,9 @@ void
 FastMeter::vertical_expose (cairo_t* cr, cairo_rectangle_t* area)
 {
 	gint top_of_meter;
+	GdkRectangle intersection;
+	GdkRectangle background;
+	GdkRectangle eventarea;
 
 	//cairo_set_source_rgb (cr, 0, 0, 0); // black
 	//rounded_rectangle (cr, 0, 0, pixwidth + 2, pixheight + 2, 2);