diff --git a/lib/nib/image.styl b/lib/nib/image.styl
index 7aeda332..7703680e 100644
--- a/lib/nib/image.styl
+++ b/lib/nib/image.styl
@@ -7,7 +7,7 @@
 
 image(path, w = auto, h = auto)
   background-image: url(path)
-  @media all and (-webkit-min-device-pixel-ratio: 1.5)
+  @media all and (-webkit-min-device-pixel-ratio: 1.5), (min--moz-device-pixel-ratio: 1.5)
     ext = extname(path)
     path = pathjoin(dirname(path), basename(path, ext) + '@2x' + ext)
     background-image: url(path)