diff --git a/target/allwinner/mandolin-pv1/config-4.9 b/target/allwinner/mandolin-pv1/config-4.9
index 6144c7d14..e757ff89a 100644
--- a/target/allwinner/mandolin-pv1/config-4.9
+++ b/target/allwinner/mandolin-pv1/config-4.9
@@ -311,7 +311,6 @@ CONFIG_FB_CMDLINE=y
 # CONFIG_FB_CONSOLE_SUNXI is not set
 CONFIG_FB_NOTIFY=y
 CONFIG_FHANDLE=y
-# CONFIG_FILE_LOCKING is not set
 # CONFIG_FIQ_DEBUGGER is not set
 # CONFIG_FIQ_WATCHDOG is not set
 CONFIG_FIRMWARE_IN_KERNEL=y
@@ -543,6 +542,7 @@ CONFIG_MAC80211_RC_MINSTREL_HT=y
 # CONFIG_MAC80211_RC_MINSTREL_VHT is not set
 # CONFIG_MACSEC is not set
 CONFIG_MAGIC_SYSRQ=y
+CONFIG_MANDATORY_FILE_LOCKING=y
 CONFIG_MAY_USE_DEVLINK=y
 CONFIG_MEDIA_CAMERA_SUPPORT=y
 CONFIG_MEDIA_CONTROLLER=y