diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index e9bdad2..99bc9e2 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -10986,6 +10986,7 @@
 python3			Python 3.x interface available. |has-python|
 python3_compiled	Compiled with Python 3.x interface. |has-python|
 python3_dynamic		Python 3.x interface is dynamically loaded. |has-python|
+python3_stable		Python 3.x interface is using Python Stable ABI. |has-python|
 pythonx			Python 2.x and/or 3.x interface available. |python_x|
 qnx			QNX version of Vim.
 quickfix		Compiled with |quickfix| support.