diff --git a/conf/machine/evb-npcm750.conf b/conf/machine/evb-npcm750.conf
index e06e93a..38c02ed 100644
--- a/conf/machine/evb-npcm750.conf
+++ b/conf/machine/evb-npcm750.conf
@@ -7,3 +7,7 @@
 
 require conf/machine/include/npcm7xx.inc
 require conf/machine/include/obmc-bsp-common.inc
+
+# Don't generate MTD flash images until we're able to include the primary
+# bootloader and the Linux MTD driver is ready.
+IMAGE_FSTYPES = "cpio.${INITRAMFS_CTYPE}.u-boot"