diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index 38ea1ff0..b7e27d17 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -128,6 +128,7 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
 #if __REALLY_HAVE_AGP
 	case _DRM_AGP:
 		map->offset = map->offset + dev->agp->base;
+		map->mtrr   = dev->agp->agp_mtrr; /* for getmap */
 		break;
 #endif
 	default:
diff --git a/linux/drm_bufs.h b/linux/drm_bufs.h
index 38ea1ff0..b7e27d17 100644
--- a/linux/drm_bufs.h
+++ b/linux/drm_bufs.h
@@ -128,6 +128,7 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
 #if __REALLY_HAVE_AGP
 	case _DRM_AGP:
 		map->offset = map->offset + dev->agp->base;
+		map->mtrr   = dev->agp->agp_mtrr; /* for getmap */
 		break;
 #endif
 	default: