diff --git a/Documentation/revisions.txt b/Documentation/revisions.txt
index 64bc83eaa5..f3a53a662b 100644
--- a/Documentation/revisions.txt
+++ b/Documentation/revisions.txt
@@ -283,6 +283,10 @@ The 'r1{caret}@' notation means all parents of 'r1'.
 The 'r1{caret}!' notation includes commit 'r1' but excludes all of its parents.
 By itself, this notation denotes the single commit 'r1'.
 
+While '<rev>{caret}<n>' was about specifying a single commit parent, these
+two notations consider all its parents. For example you can say
+'HEAD{caret}2{caret}@', however you cannot say 'HEAD{caret}@{caret}2'.
+
 Revision Range Summary
 ----------------------