diff --git a/configs/sam4l-xplained/README.txt b/configs/sam4l-xplained/README.txt
index d87a566b31..79b6f5bc88 100644
--- a/configs/sam4l-xplained/README.txt
+++ b/configs/sam4l-xplained/README.txt
@@ -719,3 +719,9 @@ Configuration sub-directories
 
       Application Configuration -> NSH Library
         CONFIG_NSH_ARCHINIT=y             : Board has architecture-specific initialization
+
+      NOTE: If you enable the I/O1 this configuration with USART0 as the
+      console and with the I/O1 module in EXT1, you *must* remove UART
+      jumper.  Otherwise, you have lookpack on USART0 and NSH will *not*
+      behave very well (since its outgoing prompts also appear as incoming
+      commands).
diff --git a/configs/sam4l-xplained/src/sam_mmcsd.c b/configs/sam4l-xplained/src/sam_mmcsd.c
index e922b8f9c2..be4a334eca 100644
--- a/configs/sam4l-xplained/src/sam_mmcsd.c
+++ b/configs/sam4l-xplained/src/sam_mmcsd.c
@@ -86,7 +86,6 @@
 
 int sam_sdinitialize(int minor)
 {
-#ifdef HAVE_MMCSD
   FAR struct spi_dev_s *spi;
   int ret;
 
@@ -118,7 +117,6 @@ int sam_sdinitialize(int minor)
 
   fvdbg("Successfuly bound SPI port %d to MMC/SD slot %d\n",
         SAM34_MMCSDSPIPORTNO, SAM34_MMCSDSLOTNO);
-#endif
 
   return OK;
 }