diff --git a/nuttx-configs/nxphlite-v3/nsh/defconfig b/nuttx-configs/nxphlite-v3/nsh/defconfig
index fb03810861..522b1d6ebf 100644
--- a/nuttx-configs/nxphlite-v3/nsh/defconfig
+++ b/nuttx-configs/nxphlite-v3/nsh/defconfig
@@ -993,7 +993,8 @@ CONFIG_LIBC_STRERROR=y
 #
 # memcpy/memset Options
 #
-# CONFIG_MEMSET_OPTSPEED is not set
+CONFIG_MEMSET_OPTSPEED=y
+CONFIG_MEMSET_64BIT=y
 # CONFIG_LIBC_DLLFCN is not set
 # CONFIG_LIBC_MODLIB is not set
 # CONFIG_LIBC_WCHAR is not set