diff --git a/doc/classes/MeshDataTool.xml b/doc/classes/MeshDataTool.xml
index 35e44519184..60137ab0064 100644
--- a/doc/classes/MeshDataTool.xml
+++ b/doc/classes/MeshDataTool.xml
@@ -114,7 +114,7 @@
 			<argument index="1" name="edge" type="int" />
 			<description>
 				Returns specified edge associated with given face.
-				Edge argument must 2 or less because a face only has three edges.
+				Edge argument must be either 0, 1, or 2 because a face only has three edges.
 			</description>
 		</method>
 		<method name="get_face_meta" qualifiers="const">
@@ -137,7 +137,7 @@
 			<argument index="1" name="vertex" type="int" />
 			<description>
 				Returns the specified vertex of the given face.
-				Vertex argument must be 2 or less because faces contain three vertices.
+				Vertex argument must be either 0, 1, or 2 because faces contain three vertices.
 			</description>
 		</method>
 		<method name="get_format" qualifiers="const">