diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index 452c1feb23..13cdd7f3b6 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -35,6 +35,7 @@ OPTIONS
 --signoff::
 	Add a `Signed-off-by:` line to the commit message, using
 	the committer identity of yourself.
+	See the signoff option in linkgit:git-commit[1] for more information.
 
 -k::
 --keep::
diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt
index 77da29a474..6154e57238 100644
--- a/Documentation/git-cherry-pick.txt
+++ b/Documentation/git-cherry-pick.txt
@@ -100,6 +100,7 @@ effect to your index in a row.
 -s::
 --signoff::
 	Add Signed-off-by line at the end of the commit message.
+	See the signoff option in linkgit:git-commit[1] for more information.
 
 -S[<keyid>]::
 --gpg-sign[=<keyid>]::
diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 7f34a5b331..9ec6b3cc17 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -154,7 +154,11 @@ OPTIONS
 -s::
 --signoff::
 	Add Signed-off-by line by the committer at the end of the commit
-	log message.
+	log message.  The meaning of a signoff depends on the project,
+	but it typically certifies that committer has
+	the rights to submit this work under the same license and
+	agrees to a Developer Certificate of Origin
+	(see http://developercertificate.org/ for more information).
 
 -n::
 --no-verify::
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index e3cdaeb958..b149e09065 100644
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -109,6 +109,7 @@ include::diff-options.txt[]
 --signoff::
 	Add `Signed-off-by:` line to the commit message, using
 	the committer identity of yourself.
+	See the signoff option in linkgit:git-commit[1] for more information.
 
 --stdout::
 	Print all commits to the standard output in mbox format,
diff --git a/Documentation/git-revert.txt b/Documentation/git-revert.txt
index b15139ffdc..573616a04a 100644
--- a/Documentation/git-revert.txt
+++ b/Documentation/git-revert.txt
@@ -89,6 +89,7 @@ effect to your index in a row.
 -s::
 --signoff::
 	Add Signed-off-by line at the end of the commit message.
+	See the signoff option in linkgit:git-commit[1] for more information.
 
 --strategy=<strategy>::
 	Use the given merge strategy.  Should only be used once.