diff --git a/clutter/clutter/clutter-blur.c b/clutter/clutter/clutter-blur.c
index 0531bdd45..8c8cde9ae 100644
--- a/clutter/clutter/clutter-blur.c
+++ b/clutter/clutter/clutter-blur.c
@@ -222,7 +222,6 @@ create_fbo (ClutterBlur *blur,
 {
   CoglContext *ctx =
     clutter_backend_get_cogl_context (clutter_get_default_backend ());
-  graphene_matrix_t projection;
   float scaled_height;
   float scaled_width;
   float height;
@@ -250,17 +249,11 @@ create_fbo (ClutterBlur *blur,
       return FALSE;
     }
 
-  graphene_matrix_init_translate (&projection,
-                                  &GRAPHENE_POINT3D_INIT (-scaled_width / 2.f,
-                                                          -scaled_height / 2.f,
-                                                          0.f));
-  graphene_matrix_scale (&projection,
-                         2.f / scaled_width,
-                         -2.f / scaled_height,
-                         1.f);
-
-  cogl_framebuffer_set_projection_matrix (pass->framebuffer, &projection);
-
+  cogl_framebuffer_orthographic (pass->framebuffer,
+                                 0.0, 0.0,
+                                 scaled_width,
+                                 scaled_height,
+                                 0.0, 1.0);
   return TRUE;
 }
 
diff --git a/clutter/clutter/clutter-paint-nodes.c b/clutter/clutter/clutter-paint-nodes.c
index ac4181f41..965bceaf1 100644
--- a/clutter/clutter/clutter-paint-nodes.c
+++ b/clutter/clutter/clutter-paint-nodes.c
@@ -1901,7 +1901,6 @@ clutter_blur_node_new (unsigned int width,
 {
   g_autoptr (CoglOffscreen) offscreen = NULL;
   g_autoptr (GError) error = NULL;
-  graphene_matrix_t projection;
   ClutterLayerNode *layer_node;
   ClutterBlurNode *blur_node;
   CoglTexture2D *tex_2d;
@@ -1945,12 +1944,10 @@ clutter_blur_node_new (unsigned int width,
                                    0,
                                    clutter_blur_get_texture (blur));
 
-  graphene_matrix_init_translate (&projection,
-                                  &GRAPHENE_POINT3D_INIT (-(width / 2.f),
-                                                          -(height / 2.f),
-                                                          0.f));
-  graphene_matrix_scale (&projection, 2.f / width, -2.f / height, 1.f);
-  cogl_framebuffer_set_projection_matrix (layer_node->offscreen, &projection);
+  cogl_framebuffer_orthographic (layer_node->offscreen,
+                                 0.0, 0.0,
+                                 width, height,
+                                 0.0, 1.0);
 
 out:
   return (ClutterPaintNode *) blur_node;