diff --git a/umount.c b/umount.c
index d790d68ff..4f6edc2e5 100644
--- a/umount.c
+++ b/umount.c
@@ -26,20 +26,32 @@
 #include <stdio.h>
 #include <mntent.h>
 #include <errno.h>
-#include <sys/mount.h>
 #include <linux/unistd.h>
 
 
-/* Include our own version of umount2 if we need it... */
+#ifndef MNT_FORCE
+#define MNT_FORCE		1
+#endif
+#ifndef MS_MGC_VAL
+#define MS_MGC_VAL		0xc0ed0000 /* Magic number indicatng "new" flags */
+#endif
+#ifndef MS_REMOUNT
+#define MS_REMOUNT		32	/* Alter flags of a mounted FS.  */
+#endif
+#ifndef MS_RDONLY
+#define MS_RDONLY		1	/* Mount read-only.  */
+#endif
 #ifndef __NR_umount2
 #define __NR_umount2           52
-#define MNT_FORCE		1
-#define MS_MGC_VAL		0xc0ed0000 /* Magic number indicatng "new" flags */
-#define MS_REMOUNT		32	/* Alter flags of a mounted FS.  */
-#define MS_RDONLY		1	/* Mount read-only.  */
-
 #endif
+
+/* Include our own version of <sys/mount.h>, since libc5 doesn't
+ * know about umount2 */
+static _syscall1(int, umount, const char *, special_file);
 static _syscall2(int, umount2, const char *, special_file, int, flags);
+static _syscall5(int, mount, const char *, special_file, const char *, dir,
+		const char *, fstype, unsigned long int, rwflag, const void *, data);
+
 
 
 static const char umount_usage[] =
diff --git a/util-linux/umount.c b/util-linux/umount.c
index d790d68ff..4f6edc2e5 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -26,20 +26,32 @@
 #include <stdio.h>
 #include <mntent.h>
 #include <errno.h>
-#include <sys/mount.h>
 #include <linux/unistd.h>
 
 
-/* Include our own version of umount2 if we need it... */
+#ifndef MNT_FORCE
+#define MNT_FORCE		1
+#endif
+#ifndef MS_MGC_VAL
+#define MS_MGC_VAL		0xc0ed0000 /* Magic number indicatng "new" flags */
+#endif
+#ifndef MS_REMOUNT
+#define MS_REMOUNT		32	/* Alter flags of a mounted FS.  */
+#endif
+#ifndef MS_RDONLY
+#define MS_RDONLY		1	/* Mount read-only.  */
+#endif
 #ifndef __NR_umount2
 #define __NR_umount2           52
-#define MNT_FORCE		1
-#define MS_MGC_VAL		0xc0ed0000 /* Magic number indicatng "new" flags */
-#define MS_REMOUNT		32	/* Alter flags of a mounted FS.  */
-#define MS_RDONLY		1	/* Mount read-only.  */
-
 #endif
+
+/* Include our own version of <sys/mount.h>, since libc5 doesn't
+ * know about umount2 */
+static _syscall1(int, umount, const char *, special_file);
 static _syscall2(int, umount2, const char *, special_file, int, flags);
+static _syscall5(int, mount, const char *, special_file, const char *, dir,
+		const char *, fstype, unsigned long int, rwflag, const void *, data);
+
 
 
 static const char umount_usage[] =