diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
index e65ac13ae3..b3ed8497a6 100644
--- a/Documentation/user-manual.txt
+++ b/Documentation/user-manual.txt
@@ -4145,8 +4145,6 @@ about the data in the object.  It's worth noting that the SHA-1 hash
 that is used to name the object is the hash of the original data
 plus this header, so `sha1sum` 'file' does not match the object name
 for 'file'.
-(Historical note: in the dawn of the age of Git the hash
-was the SHA-1 of the 'compressed' object.)
 
 As a result, the general consistency of an object can always be tested
 independently of the contents or the type of the object: all objects can