diff --git a/configs/lincoln60/README.txt b/configs/lincoln60/README.txt
index 7a06a852bb7..6ad37d363ce 100644
--- a/configs/lincoln60/README.txt
+++ b/configs/lincoln60/README.txt
@@ -413,7 +413,7 @@ host operations.  To make these modifications, do the following:
 
 When this change is made, NSH should be extended to support USB flash
 devices.  When a FLASH device is inserted, you should see a device
-appear in the /dev (psuedo) directory.  The device name should be
+appear in the /dev (pseudo) directory.  The device name should be
 like /dev/sda, /dev/sdb, etc.  The USB mass storage device, is present
 it can be mounted from the NSH command line like:
 
diff --git a/configs/lpc4330-xplorer/README.txt b/configs/lpc4330-xplorer/README.txt
index a5c0709ea49..4ebe89d9ede 100644
--- a/configs/lpc4330-xplorer/README.txt
+++ b/configs/lpc4330-xplorer/README.txt
@@ -829,7 +829,7 @@ host operations.  To make these modifications, do the following:
 
 When this change is made, NSH should be extended to support USB flash
 devices.  When a FLASH device is inserted, you should see a device
-appear in the /dev (psuedo) directory.  The device name should be
+appear in the /dev (pseudo) directory.  The device name should be
 like /dev/sda, /dev/sdb, etc.  The USB mass storage device, is present
 it can be mounted from the NSH command line like:
 
diff --git a/configs/mbed/README.txt b/configs/mbed/README.txt
index 3366ed320ed..0b98d90853e 100755
--- a/configs/mbed/README.txt
+++ b/configs/mbed/README.txt
@@ -384,7 +384,7 @@ host operations.  To make these modifications, do the following:
 
 When this change is made, NSH should be extended to support USB flash
 devices.  When a FLASH device is inserted, you should see a device
-appear in the /dev (psuedo) directory.  The device name should be
+appear in the /dev (pseudo) directory.  The device name should be
 like /dev/sda, /dev/sdb, etc.  The USB mass storage device, is present
 it can be mounted from the NSH command line like:
 
diff --git a/configs/olimex-lpc1766stk/README.txt b/configs/olimex-lpc1766stk/README.txt
index b2a1ad5fa20..b81826e3012 100755
--- a/configs/olimex-lpc1766stk/README.txt
+++ b/configs/olimex-lpc1766stk/README.txt
@@ -788,7 +788,7 @@ USB host operations.  To make these modifications, do the following:
 
 When this change is made, NSH should be extended to support USB flash
 devices.  When a FLASH device is inserted, you should see a device
-appear in the /dev (psuedo) directory.  The device name should be
+appear in the /dev (pseudo) directory.  The device name should be
 like /dev/sda, /dev/sdb, etc.  The USB mass storage device, is present
 it can be mounted from the NSH command line like: