diff --git a/configs/lpc4330-xplorer/README.txt b/configs/lpc4330-xplorer/README.txt
index cf60ca0ec9e..ce6ce5531a6 100644
--- a/configs/lpc4330-xplorer/README.txt
+++ b/configs/lpc4330-xplorer/README.txt
@@ -920,3 +920,5 @@ Where <subdir> is one of the following:
         FAT friendly 512 byte sector size and will manage the read-modify-write
         operations on the larger erase block.
       CONFIG_SPIFI_READONLY - Define to support only read-only operations.
+      CONFIG_SPIFI_LIBRARY - Don't use the LPC43xx ROM routines but, instead,
+        use an external library implementation of the SPIFI interface.
diff --git a/configs/lpc4330-xplorer/nsh/defconfig b/configs/lpc4330-xplorer/nsh/defconfig
index e6db818ca1f..deb3ff19e4c 100644
--- a/configs/lpc4330-xplorer/nsh/defconfig
+++ b/configs/lpc4330-xplorer/nsh/defconfig
@@ -678,11 +678,14 @@ CONFIG_MMCSD_HAVECARDDETECT=n
 #     FAT friendly 512 byte sector size and will manage the read-modify-write
 #     operations on the larger erase block.
 #   CONFIG_SPIFI_READONLY - Define to support only read-only operations.
+#   CONFIG_SPIFI_LIBRARY - Don't use the LPC43xx ROM routines but, instead,
+#     use an external library implementation of the SPIFI interface.
 #
 CONFIG_SPIFI_OFFSET=0
 CONFIG_SPIFI_BLKSIZE=4096
 CONFIG_SPIFI_SECTOR512=y
 CONFIG_SPIFI_RDONLY=n
+CONFIG_SPIFI_LIBRARY=n
 
 # TCP/IP and UDP support via uIP
 # CONFIG_NET - Enable or disable all network features