diff --git a/hurd/hurdsig.c b/hurd/hurdsig.c
index 3deb94f9e4..fe78819302 100644
--- a/hurd/hurdsig.c
+++ b/hurd/hurdsig.c
@@ -15,6 +15,7 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -260,7 +261,6 @@ _hurd_sigstate_actions (struct hurd_sigstate *ss)
 #include <hurd/msg_server.h>
 #include <hurd/msg_reply.h>	/* For __msg_sig_post_reply.  */
 #include <hurd/interrupt.h>
-#include <assert.h>
 #include <unistd.h>
 
 
diff --git a/mach/lowlevellock.h b/mach/lowlevellock.h
index 129a7bd91f..c5bb08795b 100644
--- a/mach/lowlevellock.h
+++ b/mach/lowlevellock.h
@@ -19,6 +19,7 @@
 #ifndef _MACH_LOWLEVELLOCK_H
 #define _MACH_LOWLEVELLOCK_H   1
 
+#include <mach.h>
 #include <mach/gnumach.h>
 #include <atomic.h>
 
diff --git a/sysdeps/mach/hurd/mig-reply.c b/sysdeps/mach/hurd/mig-reply.c
index 57bcd80862..85c3af1333 100644
--- a/sysdeps/mach/hurd/mig-reply.c
+++ b/sysdeps/mach/hurd/mig-reply.c
@@ -15,6 +15,7 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <assert.h>
 #include <mach.h>
 #include <mach/mig_support.h>
 #include <tls.h>