diff --git a/target/linux/realtek/rtl930x/config-6.6 b/target/linux/realtek/rtl930x/config-6.6
index 5b070a8371c..f1e5eb96e2d 100644
--- a/target/linux/realtek/rtl930x/config-6.6
+++ b/target/linux/realtek/rtl930x/config-6.6
@@ -85,6 +85,7 @@ CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT=y
 CONFIG_HAS_IOPORT_MAP=y
+CONFIG_HIGHMEM=y
 CONFIG_HWMON=y
 CONFIG_HZ_PERIODIC=y
 CONFIG_I2C=y