diff --git a/contributing/code/bc.rst b/contributing/code/bc.rst
index 30cffd8eae8..1d1f0a98ada 100644
--- a/contributing/code/bc.rst
+++ b/contributing/code/bc.rst
@@ -110,7 +110,7 @@ covered by our backward compatibility promise:
 +-----------------------------------------------+-----------------------------+
 | Create a new instance                         | Yes                         |
 +-----------------------------------------------+-----------------------------+
-| Extend the class                              | Yes                         |
+| Extend the class                              | No                          |
 +-----------------------------------------------+-----------------------------+
 | Access a public property                      | Yes                         |
 +-----------------------------------------------+-----------------------------+