diff --git a/lib/xmet/spc.py b/lib/xmet/spc.py
index e29dcfb..b6b1f27 100644
--- a/lib/xmet/spc.py
+++ b/lib/xmet/spc.py
@@ -605,6 +605,7 @@ class SPCOutlookLegend():
         cr.rectangle(x, y, self.COLOR_WIDTH, self.COLOR_HEIGHT)
         cr.fill()
 
+        cr.set_line_width(1)
         cr.set_source_rgb(0, 0, 0)
         cr.rectangle(x, y, self.COLOR_WIDTH, self.COLOR_HEIGHT)
         cr.stroke()