diff --git a/ChangeLog b/ChangeLog
index 3d890b8e05..425ededbb9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2011-02-16  Samuel Thibault  <samuel.thibault@ens-lyon.org>
 
+	* sysdeps/mach/i386/sysdep.h: Add _MACH_I386_SYSDEP_H inclusion
+	protection macro.
+	* sysdeps/mach/i386/thread_state.h: Add _MACH_I386_THREAD_STATE_H
+	inclusion protection macro.
+
 	* stdio-common/psiginfo.c (psiginfo): Check pinfo->si_signo against
 	SIGRTMIN and SIGRTMAX and print information in that case only when
 	SIGRTMIN is defined.
diff --git a/sysdeps/mach/i386/sysdep.h b/sysdeps/mach/i386/sysdep.h
index 4fc5d50f3d..fb77d4649c 100644
--- a/sysdeps/mach/i386/sysdep.h
+++ b/sysdeps/mach/i386/sysdep.h
@@ -18,6 +18,9 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#ifndef _MACH_I386_SYSDEP_H
+#define _MACH_I386_SYSDEP_H 1
+
 /* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO.  */
 #include <dl-sysdep.h>
 #include <tls.h>
@@ -64,3 +67,5 @@
 #undef ENTRY
 #undef ALIGN
 #include <sysdeps/unix/i386/sysdep.h>
+
+#endif /* mach/i386/sysdep.h */
diff --git a/sysdeps/mach/i386/thread_state.h b/sysdeps/mach/i386/thread_state.h
index cefea2cfb6..e8fdef6e57 100644
--- a/sysdeps/mach/i386/thread_state.h
+++ b/sysdeps/mach/i386/thread_state.h
@@ -17,6 +17,9 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#ifndef _MACH_I386_THREAD_STATE_H
+#define _MACH_I386_THREAD_STATE_H 1
+
 #include <mach/machine/thread_status.h>
 
 #define MACHINE_THREAD_STATE_FLAVOR	i386_THREAD_STATE
@@ -36,3 +39,5 @@ struct machine_thread_all_state
   };
 
 #include <sysdeps/mach/thread_state.h>
+
+#endif /* mach/i386/thread_state.h */