diff -Nur a/src/plugins/splash/script/script-lib-sprite.c b/src/plugins/splash/script/script-lib-sprite.c
--- a/src/plugins/splash/script/script-lib-sprite.c	2012-09-26 17:50:53.000000000 +0100
+++ b/src/plugins/splash/script/script-lib-sprite.c	2018-04-12 01:20:25.782074829 +0100
@@ -233,7 +233,7 @@
       if (width == 0)
         width = ply_pixel_display_get_width (display->pixel_display);
       else
-        width = MIN (width, ply_pixel_display_get_width (display->pixel_display));
+        width = MAX (width, ply_pixel_display_get_width (display->pixel_display));
     }
   return script_return_obj (script_obj_new_number (width));
 }
@@ -273,7 +273,7 @@
       if (height == 0)
         height = ply_pixel_display_get_height (display->pixel_display);
       else
-        height = MIN (height, ply_pixel_display_get_height (display->pixel_display));
+        height = MAX (height, ply_pixel_display_get_height (display->pixel_display));
     }
   return script_return_obj (script_obj_new_number (height));
 }