diff --git a/src/lib/usb-mapping.csv b/src/lib/usb-mapping.csv
index d74b08a..e6557d1 100644
--- a/src/lib/usb-mapping.csv
+++ b/src/lib/usb-mapping.csv
@@ -1,4 +1,4 @@
-# usb mapping
+# USB mapping
 
 # for Windows
 # for Intel Edison