diff --git a/target/linux/ramips/mt7621/config-3.18 b/target/linux/ramips/mt7621/config-3.18
index 06edeb1744..7dffcb5404 100644
--- a/target/linux/ramips/mt7621/config-3.18
+++ b/target/linux/ramips/mt7621/config-3.18
@@ -126,6 +126,7 @@ CONFIG_MTD_SPLIT_FIRMWARE=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TRX_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y
+# CONFIG_MTK_MTD_NAND is not set
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NET_FLOW_LIMIT=y
 CONFIG_NET_RALINK=y