diff --git a/configs/olimex-lpc1766stk/src/lpc17_nsh.c b/configs/olimex-lpc1766stk/src/lpc17_nsh.c
index caaf300375f..b4e96fda9c5 100644
--- a/configs/olimex-lpc1766stk/src/lpc17_nsh.c
+++ b/configs/olimex-lpc1766stk/src/lpc17_nsh.c
@@ -277,6 +277,8 @@ static int nsh_usbhostinitialize(void)
     }
 #endif
 
+  UNUSED(ret);
+
   /* Then get an instance of the USB host interface */
 
   syslog(LOG_INFO, "Initialize USB host\n");
diff --git a/configs/olimex-strp711/nsh/defconfig b/configs/olimex-strp711/nsh/defconfig
index 0b850f6589e..460502b495e 100644
--- a/configs/olimex-strp711/nsh/defconfig
+++ b/configs/olimex-strp711/nsh/defconfig
@@ -294,7 +294,7 @@ CONFIG_DEV_NULL=y
 # CONFIG_I2C is not set
 CONFIG_SPI=y
 # CONFIG_SPI_OWNBUS is not set
-CONFIG_SPI_EXCHANGE=y
+# CONFIG_SPI_EXCHANGE is not set
 # CONFIG_SPI_CMDDATA is not set
 # CONFIG_SPI_BITBANG is not set
 # CONFIG_I2S is not set