diff --git a/configs/README.txt b/configs/README.txt
index e6b656dc8c2..f6f12d4e423 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -207,6 +207,12 @@ defconfig -- This is a configuration file similar to the Linux
 		  are only using semaphores as mutexes (only one holder) OR
 		  if no more than two threads participate using a counting
 		  semaphore.
+		CONFIG_SEM_NNESTPRIO.  If priority inheritance is enabled,
+		  then this setting is the maximum number of higher priority
+		  threads (minus 1) than can be waiting for another thread
+		  to release a count on a semaphore.  This value may be set
+		  to zero if no more than one thread is expected to wait for
+		  a semaphore.
 
 	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 32823d716df..ed95bb8a384 100644
--- a/configs/sim/ostest/defconfig
+++ b/configs/sim/ostest/defconfig
@@ -93,6 +93,11 @@ CONFIG_ARCH_BOARD_SIM=y
 #   is disabled OR if you are only using semaphores as mutexes (only
 #   one holder) OR if no more than two threads participate using a
 #   counting semaphore.
+# CONFIG_SEM_NNESTPRIO.  If priority inheritance is enabled, then this
+#   setting is the maximum number of higher priority threads (minus 1)
+#   than can be waiting for another thread to release a count on a
+#   semaphore.  This value may be set to zero if no more than one
+#   thread is expected to wait for a semaphore.
 #
 CONFIG_EXAMPLE=ostest
 CONFIG_DEBUG=y
@@ -110,7 +115,8 @@ CONFIG_DEV_CONSOLE=y
 CONFIG_DEV_LOWCONSOLE=n
 CONFIG_MUTEX_TYPES=y
 CONFIG_PRIORITY_INHERITANCE=n
-CONFIG_SEM_PREALLOCHOLDERS=3
+CONFIG_SEM_PREALLOCHOLDERS=0
+CONFIG_SEM_NNESTPRIO=0
 
 #
 # The following can be used to disable categories of