diff --git a/sys/dev/agp/agp.c b/sys/dev/agp/agp.c
index a93805575609..b16d1ee56a01 100644
--- a/sys/dev/agp/agp.c
+++ b/sys/dev/agp/agp.c
@@ -743,6 +743,7 @@ agp_get_info(device_t dev, struct agp_info *info)
 		pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
 	info->ai_aperture_base = rman_get_start(sc->as_aperture);
 	info->ai_aperture_size = rman_get_size(sc->as_aperture);
+	info->ai_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture);
 	info->ai_memory_allowed = sc->as_maxmem;
 	info->ai_memory_used = sc->as_allocated;
 }
diff --git a/sys/dev/agp/agpvar.h b/sys/dev/agp/agpvar.h
index df3112b49d29..0869c26d2b86 100644
--- a/sys/dev/agp/agpvar.h
+++ b/sys/dev/agp/agpvar.h
@@ -47,6 +47,7 @@ struct agp_info {
 	u_int32_t	ai_mode;
 	vm_offset_t	ai_aperture_base;
 	vm_size_t	ai_aperture_size;
+	vm_offset_t	ai_aperture_va;
 	vm_size_t	ai_memory_allowed;
 	vm_size_t	ai_memory_used;
 	u_int32_t	ai_devid;
diff --git a/sys/pci/agp.c b/sys/pci/agp.c
index a93805575609..b16d1ee56a01 100644
--- a/sys/pci/agp.c
+++ b/sys/pci/agp.c
@@ -743,6 +743,7 @@ agp_get_info(device_t dev, struct agp_info *info)
 		pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
 	info->ai_aperture_base = rman_get_start(sc->as_aperture);
 	info->ai_aperture_size = rman_get_size(sc->as_aperture);
+	info->ai_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture);
 	info->ai_memory_allowed = sc->as_maxmem;
 	info->ai_memory_used = sc->as_allocated;
 }
diff --git a/sys/pci/agpvar.h b/sys/pci/agpvar.h
index df3112b49d29..0869c26d2b86 100644
--- a/sys/pci/agpvar.h
+++ b/sys/pci/agpvar.h
@@ -47,6 +47,7 @@ struct agp_info {
 	u_int32_t	ai_mode;
 	vm_offset_t	ai_aperture_base;
 	vm_size_t	ai_aperture_size;
+	vm_offset_t	ai_aperture_va;
 	vm_size_t	ai_memory_allowed;
 	vm_size_t	ai_memory_used;
 	u_int32_t	ai_devid;