diff --git a/Linux-udev-keys-binding.md b/Linux-udev-keys-binding.md
index 6e5d66e..c8ab590 100644
--- a/Linux-udev-keys-binding.md
+++ b/Linux-udev-keys-binding.md
@@ -41,7 +41,7 @@ As root, create a file `/etc/udev/hwdb.d/61-smart-pointer.hwdb` and put in it so
       KEYBOARD_KEY_700e2=unknown  # key marked ALT-TAB #1 -> nothing 
       KEYBOARD_KEY_7002b=f11      # key marked ALT-TAB #2 -> full screen
 
-The formula `b0003v0EF5p3014*` is constructed by chaining character `b`, bus value 0x3 using 4 digits (`0003`), character `v`, vendor value 0xef5 using 4 digits (`0EF5`), character `p`, product value 0x3014 using 4 digits (`3014`), a star `*`. Very important, hex digits **should be capitalized**.
+The formula `b0003v0EF5p3014*` is constructed by chaining character `b`, bus value `0003`, character `v`, vendor value `0EF5`, character `p`, product value `3014`, a star `*`. Very important, hex digits **should be have 4 capitalized digits**.
 
 To give the value `pageup` to top key having scancode 0x7004b, write