diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index 874ea56..256ec99 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -1609,7 +1609,7 @@
                            name);
                 goto fail;
             }
-            tb = g_memdup(&bm->table, sizeof(bm->table));
+            tb = g_memdup2(&bm->table, sizeof(bm->table));
             bm->table.offset = 0;
             bm->table.size = 0;
             QSIMPLEQ_INSERT_TAIL(&drop_tables, tb, entry);