diff --git a/src/kernel/boot/platform/bios_ia32/mmu.cpp b/src/kernel/boot/platform/bios_ia32/mmu.cpp
index be3f1feafb..4d9d990d5e 100644
--- a/src/kernel/boot/platform/bios_ia32/mmu.cpp
+++ b/src/kernel/boot/platform/bios_ia32/mmu.cpp
@@ -238,12 +238,15 @@ extern "C" addr_t
 mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint32 flags)
 {
 	addr_t address = sNextVirtualAddress;
+	addr_t pageOffset = physicalAddress & (B_PAGE_SIZE - 1);
+
+	physicalAddress -= pageOffset;
 
 	for (addr_t offset = 0; offset < size; offset += B_PAGE_SIZE) {
 		map_page(get_next_virtual_page(), physicalAddress + offset, flags);
 	}
 
-	return address;
+	return address + pageOffset;
 }