diff --git a/doc/stages/filters.greedyprojection.rst b/doc/stages/filters.greedyprojection.rst
index a2644d45df..f603dbe071 100644
--- a/doc/stages/filters.greedyprojection.rst
+++ b/doc/stages/filters.greedyprojection.rst
@@ -29,8 +29,9 @@ Example
           "radius": 10
         },
         {
-          "type":"writers.las",
-          "filename":"output.las"
+          "type":"writers.ply",
+          "faces":true,
+          "filename":"output.ply"
         }
       ]
     }
diff --git a/doc/stages/filters.gridprojection.rst b/doc/stages/filters.gridprojection.rst
index 82a4d7c2ea..3489fabba0 100644
--- a/doc/stages/filters.gridprojection.rst
+++ b/doc/stages/filters.gridprojection.rst
@@ -28,8 +28,9 @@ Example
           "type":"filters.gridprojection"
         },
         {
-          "type":"writers.las",
-          "filename":"output.las"
+          "type":"writers.ply",
+          "faces":true,
+          "filename":"output.ply"
         }
       ]
     }