diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index df811140..ef2f82a1 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -568,7 +568,7 @@ static int apic_probe(void)
 
 	// searching MP signature in the reserved memory areas
 #ifdef CONFIG_MULTIBOOT
-	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);