diff --git a/configs/sim/ostest/defconfig b/configs/sim/ostest/defconfig
index fd78374739b..90aef54b21f 100644
--- a/configs/sim/ostest/defconfig
+++ b/configs/sim/ostest/defconfig
@@ -16,7 +16,7 @@ CONFIG_HOST_LINUX=y
 #
 # Build Configuration
 #
-# CONFIG_APPS_DIR="../apps"
+#CONFIG_APPS_DIR="../apps"
 CONFIG_BUILD_FLAT=y
 # CONFIG_BUILD_2PASS is not set
 
@@ -90,9 +90,9 @@ CONFIG_ARCH="sim"
 #
 # Simulation Configuration Options
 #
-CONFIG_SIM_M32=y
 CONFIG_HOST_X86_64=y
 # CONFIG_HOST_X86 is not set
+CONFIG_SIM_M32=y
 # CONFIG_SIM_WALLTIME is not set
 # CONFIG_SIM_SPIFLASH is not set
 
@@ -365,6 +365,9 @@ CONFIG_SERIAL=y
 # CONFIG_DISABLE_PSEUDOFS_OPERATIONS is not set
 # CONFIG_FS_READABLE is not set
 # CONFIG_FS_WRITABLE is not set
+CONFIG_FS_NAMED_SEMAPHORES=y
+CONFIG_FS_NAMED_SEMPATH="/var/lock"
+CONFIG_FS_MQUEUE_MPATH="/var/mqueue"
 # CONFIG_FS_RAMMAP is not set
 # CONFIG_FS_FAT is not set
 # CONFIG_FS_NXFFS is not set