diff --git a/doc/Changelog b/doc/Changelog
index 4cc6afb..51163ad 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -29,6 +29,8 @@ sysvinit (2.88dsf) UNRELEASED; urgency=low
     to disk using fdatasync().  Patch from Scott Gifford via Debian.
   * Add compatibility code to handle old path "/etc/powerstatus" for a
     while.
+  * Incude definition for MNT_DETACH which is missing in older GNU libc
+    headers.
 
   [ Werner Fink ]
   * Add the comment from Andrea Arcangeli about the correct
diff --git a/src/init.c b/src/init.c
index 7b414f0..29f3ebb 100644
--- a/src/init.c
+++ b/src/init.c
@@ -55,6 +55,9 @@
 #ifdef WITH_SELINUX
 #  include <selinux/selinux.h>
 #  include <sys/mount.h>
+#  ifndef MNT_DETACH /* present in glibc 2.10, missing in 2.7 */
+#    define MNT_DETACH 2
+#  endif
 #endif
 
 #ifdef __i386__