Create the dbm package from PEP 3108. #2881.
diff --git a/Doc/distutils/setupscript.rst b/Doc/distutils/setupscript.rst
index 3cc1da9..616b99c 100644
--- a/Doc/distutils/setupscript.rst
+++ b/Doc/distutils/setupscript.rst
@@ -316,7 +316,7 @@
 library search path on target systems ::
 
    Extension(...,
-             libraries=['gdbm', 'readline'])
+             libraries=['_gdbm', 'readline'])
 
 If you need to link with libraries in a non-standard location, you'll have to
 include the location in ``library_dirs``::