diff --git a/Source/Apps/copysl/copysl.doc b/Source/Apps/copysl/copysl.doc
index f252dab8..d924b444 100644
--- a/Source/Apps/copysl/copysl.doc
+++ b/Source/Apps/copysl/copysl.doc
@@ -88,6 +88,7 @@ History
 * v 0.1 Initial Release
 * v 0.2 Added the /v command option to read and verify after write
 * v 0.3 Refresh CP/M disk buffers after completion
+* v 0.4 Correct slice fit within partition calculation
 
 Future
 ------