diff --git a/utils/genrandconfig b/utils/genrandconfig
index 60922e871c..846cf1aa9f 100755
--- a/utils/genrandconfig
+++ b/utils/genrandconfig
@@ -530,6 +530,12 @@ def fixup_config(sysinfo, configfile):
         configlines.remove('BR2_TARGET_ROOTFS_UBIFS_MAXLEBCNT=2048\n')
         configlines.append('BR2_TARGET_ROOTFS_UBIFS_MAXLEBCNT=41610\n')
 
+    if 'BR2_TARGET_ROOTFS_UBI=y\n' in configlines and \
+       'BR2_TARGET_ROOTFS_UBI_USE_CUSTOM_CONFIG=y\n' in configlines and \
+       'BR2_TARGET_ROOTFS_UBI_CUSTOM_CONFIG_FILE=""\n' in configlines:
+        configlines.remove('BR2_TARGET_ROOTFS_UBI_USE_CUSTOM_CONFIG=y\n')
+        configlines.remove('BR2_TARGET_ROOTFS_UBI_CUSTOM_CONFIG_FILE=""\n')
+
     if 'BR2_TARGET_S500_BOOTLOADER=y\n' in configlines and \
        'BR2_TARGET_S500_BOOTLOADER_BOARD=""\n' in configlines:
         configlines.remove('BR2_TARGET_S500_BOOTLOADER=y\n')