diff --git a/Doc/tutorial/modules.rst b/Doc/tutorial/modules.rst
index afce7f81d226fd42fced45a9f44c646a839467b0..c5cca91791796bb5f5404baaa97d564691698e91 100644
--- a/Doc/tutorial/modules.rst
+++ b/Doc/tutorial/modules.rst
@@ -183,7 +183,8 @@ The Module Search Path
 .. index:: triple: module; search; path
 
 When a module named :mod:`spam` is imported, the interpreter first searches for
-a built-in module with that name. If not found, it then searches for a file
+a built-in module with that name. These module names are listed in
+:data:`sys.builtin_module_names`. If not found, it then searches for a file
 named :file:`spam.py` in a list of directories given by the variable
 :data:`sys.path`.  :data:`sys.path` is initialized from these locations: