diff --git a/ChangeLog b/ChangeLog
index f3944417..e440b310 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2009-01-24  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* src/su.c: Do not sanitize the environment. This breaks
+	--preserve-environment. This sanitation was disabled on Debian
+	since quite some time with no reported issues, and sanitize_env()
+	documentation agrees that it should be useless as all modern
+	Unixes will handle setuid executables properly. This Fixes
+	Alioth#312287.
+
 2009-01-24  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* libmisc/setupenv.c: Fix typo from 2009-11-01.
diff --git a/src/su.c b/src/su.c
index 97970037..a0ee6d8d 100644
--- a/src/su.c
+++ b/src/su.c
@@ -409,8 +409,6 @@ int main (int argc, char **argv)
 #endif
 #endif				/* !USE_PAM */
 
-	sanitize_env ();
-
 	(void) setlocale (LC_ALL, "");
 	(void) bindtextdomain (PACKAGE, LOCALEDIR);
 	(void) textdomain (PACKAGE);