diff --git a/sys/kern/sys_timerfd.c b/sys/kern/sys_timerfd.c
index d9c0e189baf2..30c3709e59a6 100644
--- a/sys/kern/sys_timerfd.c
+++ b/sys/kern/sys_timerfd.c
@@ -44,6 +44,7 @@
 #include <sys/selinfo.h>
 #include <sys/stat.h>
 #include <sys/sx.h>
+#include <sys/syscallsubr.h>
 #include <sys/sysctl.h>
 #include <sys/sysent.h>
 #include <sys/sysproto.h>
diff --git a/sys/sys/syscallsubr.h b/sys/sys/syscallsubr.h
index 1eb9582a907d..25df3f03f1de 100644
--- a/sys/sys/syscallsubr.h
+++ b/sys/sys/syscallsubr.h
@@ -362,6 +362,11 @@ int	kern_thr_alloc(struct proc *, int pages, struct thread **);
 int	kern_thr_exit(struct thread *td);
 int	kern_thr_new(struct thread *td, struct thr_param *param);
 int	kern_thr_suspend(struct thread *td, struct timespec *tsp);
+int	kern_timerfd_create(struct thread *td, int clockid, int flags);
+int	kern_timerfd_gettime(struct thread *td, int fd,
+	    struct itimerspec *curr_value);
+int	kern_timerfd_settime(struct thread *td, int fd, int flags,
+	    const struct itimerspec *new_value, struct itimerspec *old_value);
 int	kern_truncate(struct thread *td, const char *path,
 	    enum uio_seg pathseg, off_t length);
 int	kern_funlinkat(struct thread *td, int dfd, const char *path, int fd,
diff --git a/sys/sys/timerfd.h b/sys/sys/timerfd.h
index cace3b71498c..06409a77f7d2 100644
--- a/sys/sys/timerfd.h
+++ b/sys/sys/timerfd.h
@@ -58,13 +58,6 @@ __END_DECLS
 
 #else /* _KERNEL */
 
-struct thread;
-
-int kern_timerfd_create(struct thread *td, int clockid, int flags);
-int kern_timerfd_gettime(struct thread *td, int fd,
-    struct itimerspec *curr_value);
-int kern_timerfd_settime(struct thread *td, int fd, int flags,
-    const struct itimerspec *new_value, struct itimerspec *old_value);
 void timerfd_jumped(void);
 
 #endif /* !_KERNEL */