diff --git a/sys/compat/linuxkpi/common/include/linux/page.h b/sys/compat/linuxkpi/common/include/linux/page.h
--- a/sys/compat/linuxkpi/common/include/linux/page.h
+++ b/sys/compat/linuxkpi/common/include/linux/page.h
@@ -72,6 +72,7 @@
 		return (VM_MEMATTR_DEFAULT);
 }
 
+#define	page_to_virt(page)	linux_page_address(page)
 #define	virt_to_page(x)		PHYS_TO_VM_PAGE(vtophys(x))
 #define	page_to_pfn(pp)		(VM_PAGE_TO_PHYS(pp) >> PAGE_SHIFT)
 #define	pfn_to_page(pfn)	(PHYS_TO_VM_PAGE((pfn) << PAGE_SHIFT))