diff --git a/target/linux/ath79/config-5.10 b/target/linux/ath79/config-5.10
index 9aa320dcda..d4abddb445 100644
--- a/target/linux/ath79/config-5.10
+++ b/target/linux/ath79/config-5.10
@@ -96,6 +96,7 @@ CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
 CONFIG_MDIO_GPIO=y
 CONFIG_MEMFD_CREATE=y
+# CONFIG_MFD_RB4XX_CPLD is not set
 CONFIG_MFD_SYSCON=y
 CONFIG_MIGRATION=y
 CONFIG_MIPS=y