diff --git a/arch/x86/mm/page.c b/arch/x86/mm/page.c
index b2cfaad4..1e86cb53 100644
--- a/arch/x86/mm/page.c
+++ b/arch/x86/mm/page.c
@@ -338,7 +338,7 @@ size_t map_region(size_t viraddr, size_t phyaddr, uint32_t npages, uint32_t flag
 			pgt = (page_table_t*) ((KERNEL_SPACE - 1024*PAGE_SIZE + index*PAGE_SIZE) & 0xFFFFF000);
 
 		index = (viraddr >> 12) & 0x3FF;
-		if (BUILTIN_EXPECT(pgt->entries[index], 0)) {
+		if (pgt->entries[index] && !(flags & MAP_REMAP)) {
 			spinlock_unlock(pgd_lock);
 			kprintf("0x%x is already maped\n", viraddr);
 			return 0;
diff --git a/include/metalsvm/stdlib.h b/include/metalsvm/stdlib.h
index 0a568204..4d9e2dc2 100644
--- a/include/metalsvm/stdlib.h
+++ b/include/metalsvm/stdlib.h
@@ -42,7 +42,6 @@ extern "C" {
 #define MAP_PAGE_TABLE		(1 << 2)
 #define MAP_NO_CACHE		(1 << 3)
 #define MAP_WT			(1 << 5)
-//#define MAP_HEAP		(1 << 5)
 #define MAP_CODE		(1 << 6)
 #define MAP_READONLY		(1 << 7)
 #ifdef CONFIG_ROCKCREEK
@@ -51,6 +50,7 @@ extern "C" {
 #define MAP_SVM_STRONG		(1 << 9)
 #define MAP_SVM_LAZYRELEASE	(1 << 10)
 #define MAP_NO_ACCESS		(1 << 11)
+#define MAP_REMAP		(1 << 12)
 
 void NORETURN abort(void);