diff --git a/src/core/dbus-execute.c b/src/core/dbus-execute.c
index 7344623ebf6..c342093bca4 100644
--- a/src/core/dbus-execute.c
+++ b/src/core/dbus-execute.c
@@ -18,6 +18,7 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <sys/mount.h>
 #include <sys/prctl.h>
 #include <stdio_ext.h>
 
diff --git a/src/core/manager.h b/src/core/manager.h
index 28c5da225b1..e09e0cdf5e9 100644
--- a/src/core/manager.h
+++ b/src/core/manager.h
@@ -20,7 +20,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <libmount.h>
 #include <stdbool.h>
 #include <stdio.h>
 
@@ -34,6 +33,8 @@
 #include "list.h"
 #include "ratelimit.h"
 
+struct libmnt_monitor;
+
 /* Enforce upper limit how many names we allow */
 #define MANAGER_MAX_NAMES 131072 /* 128K */
 
diff --git a/src/core/mount.c b/src/core/mount.c
index 0e755da5c02..0154ebda5d6 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -23,6 +23,8 @@
 #include <stdio.h>
 #include <sys/epoll.h>
 
+#include <libmount.h>
+
 #include "sd-messages.h"
 
 #include "alloc-util.h"