diff --git a/ch04.asciidoc b/ch04.asciidoc
index ca514eda..2336bed0 100644
--- a/ch04.asciidoc
+++ b/ch04.asciidoc
@@ -342,7 +342,7 @@ In bitcoin, most of the data presented to the user is Base58Check-encoded to mak
 |Type|Prefix|Description
 | Raw | None | 32 bytes
 | Hex | None | 64 hexadecimal digits
-| WIF |  5 | Base58Check encoding: Base58 with version prefix of 128- and 32-bit checksum
+| WIF |  5 | Base58Check encoding: Base58 with version prefix of 0x80 and 4-byte checksum
 | WIF-compressed | K or L | As above, with added suffix 0x01 before encoding
 |=======