--- ./conf/example.conf.in.orig
+++ ./conf/example.conf.in
@@ -694,6 +694,7 @@
 	# Configuration option global/library_dir.
 	# Search this directory first for shared libraries.
 	# This configuration option does not have a default value defined.
+	library_dir="/lib/device-mapper"
 
 	# Configuration option global/locking_library.
 	# The external locking library to use for locking_type 2.
