diff --git a/Documentation/git-daemon.txt b/Documentation/git-daemon.txt
index b08a08cd95..f1a570a874 100644
--- a/Documentation/git-daemon.txt
+++ b/Documentation/git-daemon.txt
@@ -270,6 +270,15 @@ selectively enable/disable services per repository::
 ----------------------------------------------------------------
 
 
+ENVIRONMENT
+-----------
+'git-daemon' will set REMOTE_ADDR to the IP address of the client
+that connected to it, if the IP address is available. REMOTE_ADDR will
+be available in the environment of hooks called when
+services are performed.
+
+
+
 Author
 ------
 Written by Linus Torvalds <torvalds@osdl.org>, YOSHIFUJI Hideaki
diff --git a/daemon.c b/daemon.c
index 3e5582d289..b9ba44c582 100644
--- a/daemon.c
+++ b/daemon.c
@@ -537,6 +537,10 @@ static int execute(struct sockaddr *addr)
 #endif
 		}
 		loginfo("Connection from %s:%d", addrbuf, port);
+		setenv("REMOTE_ADDR", addrbuf, 1);
+	}
+	else {
+		unsetenv("REMOTE_ADDR");
 	}
 
 	alarm(init_timeout ? init_timeout : timeout);