diff --git a/configs/sam3u-ek/README.txt b/configs/sam3u-ek/README.txt
index 42cab8243f0..c947cc5764f 100755
--- a/configs/sam3u-ek/README.txt
+++ b/configs/sam3u-ek/README.txt
@@ -250,6 +250,9 @@ SAM3U-EK-specific Configuration Options
 
   Individual subsystems can be enabled:
 
+	CONFIG_SAM3U_DMA
+	CONFIG_SAM3U_NAND
+	CONFIG_SAM3U_HSMCI
 	CONFIG_SAM3U_UART
 	CONFIG_SAM3U_USART0
 	CONFIG_SAM3U_USART1
diff --git a/configs/sam3u-ek/ostest/defconfig b/configs/sam3u-ek/ostest/defconfig
index 354cbea01f7..9ee92ecf114 100755
--- a/configs/sam3u-ek/ostest/defconfig
+++ b/configs/sam3u-ek/ostest/defconfig
@@ -100,6 +100,9 @@ CONFIG_SAM3U_BUILDROOT=y
 #
 #  Individual subsystems can be enabled:
 #
+CONFIG_SAM3U_DMA=n
+CONFIG_SAM3U_NAND=n
+CONFIG_SAM3U_HSMCI=n
 CONFIG_SAM3U_UART=y
 CONFIG_SAM3U_USART0=n
 CONFIG_SAM3U_USART1=n