diff --git a/src/matrix.cpp b/src/matrix.cpp
index 5dfe4d3..a46da73 100644
--- a/src/matrix.cpp
+++ b/src/matrix.cpp
@@ -321,14 +321,15 @@ bool Matrix::on_expose_event(GdkEventExpose *event)
 	const int alloc_height = allocation.get_height();
 
 	Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
-	cr->set_line_width(1.0);
-	cr->set_antialias(Cairo::ANTIALIAS_NONE);
-	cr->translate(0.5, 0.5);
 
 	// Set clipping area
 	cr->rectangle(event->area.x, event->area.y, event->area.width, event->area.height);
 	cr->clip();
 
+	cr->set_line_width(1.0);
+	cr->set_antialias(Cairo::ANTIALIAS_NONE);
+	cr->translate(0.5, 0.5);
+
 	// Clear background
 	SetColour(cr, cfg.Background);
 	cr->rectangle(0, 0, alloc_width, alloc_height);