diff --git a/target/linux/ath79/config-4.19 b/target/linux/ath79/config-4.19
index 81fd017aba..92af6ba970 100644
--- a/target/linux/ath79/config-4.19
+++ b/target/linux/ath79/config-4.19
@@ -139,6 +139,7 @@ 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
diff --git a/target/linux/ath79/config-5.4 b/target/linux/ath79/config-5.4
index b458edce1e..449f42bba7 100644
--- a/target/linux/ath79/config-5.4
+++ b/target/linux/ath79/config-5.4
@@ -148,6 +148,7 @@ 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