diff --git a/configs/README.txt b/configs/README.txt
index e9b930cb1b..cfd20b3b96 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -195,8 +195,10 @@ defconfig -- This is a configuration file similar to the Linux
 		CONFIG_JULIAN_TIME - Enables Julian time conversions
 		CONFIG_DEV_CONSOLE - Set if architecture-specific logic
 		  provides /dev/console.  Enables stdout, stderr, stdin.
-		CONFIG_MUTEX_TYPES - Set to enabled support for recursive and
+		CONFIG_MUTEX_TYPES - Set to enable support for recursive and
 		  errorcheck mutexes.  Enables pthread_mutexattr_settype().
+		CONFIG_PRIORITY_INHERITANCE - Set to enable support for
+		  priority inheritance on mutexes and semaphores.
 
 	The following can be used to disable categories of APIs supported
 	by the OS.  If the compiler supports weak functions, then it
diff --git a/configs/sim/ostest/defconfig b/configs/sim/ostest/defconfig
index 4ea688e85d..f6e766dd5b 100644
--- a/configs/sim/ostest/defconfig
+++ b/configs/sim/ostest/defconfig
@@ -1,7 +1,7 @@
 ############################################################################
 # configs/sim/ostest/defconfig
 #
-#   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -98,6 +98,7 @@ CONFIG_JULIAN_TIME=n
 CONFIG_DEV_CONSOLE=y
 CONFIG_DEV_LOWCONSOLE=n
 CONFIG_MUTEX_TYPES=y
+CONFIG_PRIORITY_INHERITANCE=n
 
 #
 # The following can be used to disable categories of