diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index e7ffbe7dea35..97540bbf2cad 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -29,6 +29,7 @@
  *	$FreeBSD$
  */
 
+#define __RMAN_RESOURCE_VISIBLE
 #include "opt_acpi.h"
 #include <sys/param.h>
 #include <sys/kernel.h>
diff --git a/sys/i386/i386/nexus.c b/sys/i386/i386/nexus.c
index 3812c0a1acf3..6c72129de243 100644
--- a/sys/i386/i386/nexus.c
+++ b/sys/i386/i386/nexus.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
 
 #include "opt_isa.h"
 
+#define __RMAN_RESOURCE_VISIBLE
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/bus.h>
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index cff6e7f38bae..8c8b799aa7e0 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -29,6 +29,7 @@ __FBSDID("$FreeBSD$");
 
 #include "opt_bus.h"
 
+#define __RMAN_RESOURCE_VISIBLE
 #include <sys/param.h>
 #include <sys/conf.h>
 #include <sys/filio.h>
diff --git a/sys/kern/subr_rman.c b/sys/kern/subr_rman.c
index 754695b5cb82..5eb4bc22d5dd 100644
--- a/sys/kern/subr_rman.c
+++ b/sys/kern/subr_rman.c
@@ -58,6 +58,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#define __RMAN_RESOURCE_VISIBLE
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
diff --git a/sys/sys/rman.h b/sys/sys/rman.h
index 68dd1bde6e63..d3af80457495 100644
--- a/sys/sys/rman.h
+++ b/sys/sys/rman.h
@@ -93,6 +93,7 @@ struct u_rman {
  * at some point in the future, particularly if we want to support 36-bit
  * addresses on IA32 hardware.
  */
+#ifdef __RMAN_RESOURCE_VISIBLE
 TAILQ_HEAD(resource_head, resource);
 struct resource {
 	TAILQ_ENTRY(resource)	r_link;
@@ -119,6 +120,11 @@ struct rman {
 	const	char *rm_descr;	/* text descripion of this resource */
 };
 TAILQ_HEAD(rman_head, rman);
+#else
+struct resource;
+struct rman;
+struct device;
+#endif
 
 int	rman_activate_resource(struct resource *r);
 int	rman_await_resource(struct resource *r, int pri, int timo);