diff --git a/target/linux/ramips/mt7621/config-4.4 b/target/linux/ramips/mt7621/config-4.4
index 58568c8114..9132d894df 100644
--- a/target/linux/ramips/mt7621/config-4.4
+++ b/target/linux/ramips/mt7621/config-4.4
@@ -115,6 +115,7 @@ CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 CONFIG_HIGHMEM=y
 CONFIG_HW_HAS_PCI=y
 CONFIG_HZ_PERIODIC=y
+# CONFIG_IMG_MDC_DMA is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_IRQCHIP=y
 CONFIG_IRQ_DOMAIN=y