diff --git a/migration/ram.c b/migration/ram.c
index 7266351..6ce7770 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -169,6 +169,11 @@
                     rb->receivedmap);
 }
 
+bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset)
+{
+    return test_bit(byte_offset >> TARGET_PAGE_BITS, rb->receivedmap);
+}
+
 void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr)
 {
     set_bit_atomic(ramblock_recv_bitmap_offset(host_addr, rb), rb->receivedmap);
diff --git a/migration/ram.h b/migration/ram.h
index 53f0021..5030be1 100644
--- a/migration/ram.h
+++ b/migration/ram.h
@@ -60,6 +60,7 @@
 void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
 
 int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr);
+bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
 void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr);
 void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);