diff --git a/boards/px4/fmu-v5/nuttx-config/optimized/defconfig b/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
index 055dfd2a05..08051518c1 100644
--- a/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/optimized/defconfig
@@ -96,7 +96,6 @@ CONFIG_MTD_BYTE_WRITE=y
 CONFIG_MTD_PARTITION=y
 CONFIG_MTD_RAMTRON=y
 CONFIG_NAME_MAX=40
-CONFIG_NFILE_DESCRIPTORS=12
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_ARCHROMFS=y
 CONFIG_NSH_ARGCAT=y
@@ -105,9 +104,6 @@ CONFIG_NSH_CMDPARMS=y
 CONFIG_NSH_CROMFSETC=y
 CONFIG_NSH_DISABLE_IFCONFIG=y
 CONFIG_NSH_DISABLE_IFUPDOWN=y
-CONFIG_NSH_DISABLE_MB=y
-CONFIG_NSH_DISABLE_MH=y
-CONFIG_NSH_DISABLE_MW=y
 CONFIG_NSH_DISABLE_TELNETD=y
 CONFIG_NSH_LINELEN=128
 CONFIG_NSH_MAXARGUMENTS=15