--- a/rsvg-mask.c	2013-09-09 14:24:42.000000000 -0300
+++ b/rsvg-mask.c	2013-09-09 19:39:33.000000000 -0300
@@ -77,10 +77,10 @@
     _rsvg_node_init (&mask->super, RSVG_NODE_TYPE_MASK);
     mask->maskunits = objectBoundingBox;
     mask->contentunits = userSpaceOnUse;
-    mask->x = _rsvg_css_parse_length ("0");
-    mask->y = _rsvg_css_parse_length ("0");
-    mask->width = _rsvg_css_parse_length ("1");
-    mask->height = _rsvg_css_parse_length ("1");
+    mask->x = _rsvg_css_parse_length ("-10%");
+    mask->y = _rsvg_css_parse_length ("-10%");
+    mask->width = _rsvg_css_parse_length ("120%");
+    mask->height = _rsvg_css_parse_length ("120%");
     mask->super.set_atts = rsvg_mask_set_atts;
     return &mask->super;
 }