diff --git a/configs/ea3131/README.txt b/configs/ea3131/README.txt
index eef5fffcfe4..e683a6e1ab0 100755
--- a/configs/ea3131/README.txt
+++ b/configs/ea3131/README.txt
@@ -400,3 +400,14 @@ Where <subdir> is one of the following:
     This configuration directory, performs a simple OS test using
     examples/ostest.  By default, this project assumes that you are
     using the DFU bootloader.
+
+  usbserial:
+    This configuration directory exercises the USB serial class
+    driver at examples/usbserial.  See examples/README.txt for
+    more information.
+
+  usbstorage:
+    This configuration directory exercises the USB mass storage
+    class driver at examples/usbstorage.  See examples/README.txt for
+    more information.
+