diff --git a/gsk/gskrendernodeimpl.c b/gsk/gskrendernodeimpl.c
index fb392d5966..12e339749d 100644
--- a/gsk/gskrendernodeimpl.c
+++ b/gsk/gskrendernodeimpl.c
@@ -509,8 +509,8 @@ gsk_radial_gradient_node_new (const graphene_rect_t  *bounds,
   g_return_val_if_fail (center != NULL, NULL);
   g_return_val_if_fail (hradius > 0., NULL);
   g_return_val_if_fail (vradius > 0., NULL);
-  g_return_val_if_fail (start > 0., NULL);
-  g_return_val_if_fail (end > 0., NULL);
+  g_return_val_if_fail (start >= 0., NULL);
+  g_return_val_if_fail (end >= 0., NULL);
   g_return_val_if_fail (color_stops != NULL, NULL);
   g_return_val_if_fail (n_color_stops >= 2, NULL);
   g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
@@ -554,8 +554,8 @@ gsk_repeating_radial_gradient_node_new (const graphene_rect_t  *bounds,
   g_return_val_if_fail (center != NULL, NULL);
   g_return_val_if_fail (hradius > 0., NULL);
   g_return_val_if_fail (vradius > 0., NULL);
-  g_return_val_if_fail (start > 0., NULL);
-  g_return_val_if_fail (end > 0., NULL);
+  g_return_val_if_fail (start >= 0., NULL);
+  g_return_val_if_fail (end >= 0., NULL);
   g_return_val_if_fail (color_stops != NULL, NULL);
   g_return_val_if_fail (n_color_stops >= 2, NULL);
   g_return_val_if_fail (color_stops[0].offset >= 0, NULL);
diff --git a/gsk/gskrendernodeparser.c b/gsk/gskrendernodeparser.c
index 5520167950..870ce8818b 100644
--- a/gsk/gskrendernodeparser.c
+++ b/gsk/gskrendernodeparser.c
@@ -1020,7 +1020,7 @@ parse_radial_gradient_node_internal (GtkCssParser *parser,
   graphene_point_t center = GRAPHENE_POINT_INIT (25, 25);
   double hradius = 25.0;
   double vradius = 25.0;
-  double start = 0.5;
+  double start = 0;
   double end = 1.0;
   GArray *stops = NULL;
   const Declaration declarations[] = {