diff --git a/sys/kern/subr_rman.c b/sys/kern/subr_rman.c
index 544603968336..56c0979b14ba 100644
--- a/sys/kern/subr_rman.c
+++ b/sys/kern/subr_rman.c
@@ -685,3 +685,9 @@ rman_get_rid(struct resource *r)
 {
 	return (r->r_rid);
 }
+
+struct device *
+rman_get_device(struct resource *r)
+{
+	return (r->r_dev);
+}
diff --git a/sys/sys/rman.h b/sys/sys/rman.h
index 40fe3074601e..6bec626115f7 100644
--- a/sys/sys/rman.h
+++ b/sys/sys/rman.h
@@ -134,6 +134,7 @@ uint32_t rman_make_alignment_flags(uint32_t size);
 
 u_long	rman_get_start(struct resource *_r);
 u_long	rman_get_end(struct resource *_r);
+struct device *rman_get_device(struct resource *);
 u_long	rman_get_size(struct resource *_r);
 u_int	rman_get_flags(struct resource *_r);
 void	rman_set_virtual(struct resource *_r, void *_v);