diff --git a/arch/x86/mm/page.c b/arch/x86/mm/page.c
index 3853ca06..62944017 100644
--- a/arch/x86/mm/page.c
+++ b/arch/x86/mm/page.c
@@ -364,7 +364,7 @@ int arch_paging_init(void)
 	/*
 	 * Map reserved memory regions into the kernel space
 	 */
-	if (mb_info && (mb_info->flags & (1 << 6))) {
+	if (mb_info && (mb_info->flags & MULTIBOOT_INFO_MEM_MAP)) {
 		multiboot_memory_map_t* mmap = (multiboot_memory_map_t*) mb_info->mmap_addr;
 		multiboot_memory_map_t* mmap_end = (void*) ((size_t) mb_info->mmap_addr + mb_info->mmap_length);
 
@@ -383,7 +383,7 @@ int arch_paging_init(void)
 	 * Modules like the init ram disk are already loaded.
 	 * Therefore, we map these moduels into the kernel space.
 	 */
-	if (mb_info && (mb_info->flags & (1 << 3))) {
+	if (mb_info && (mb_info->flags & MULTIBOOT_INFO_MODS)) {
 		multiboot_module_t* mmodule = (multiboot_module_t*) mb_info->mods_addr;
 
 		for(i=0; i<mb_info->mods_count; i++, mmodule++) {