diff --git a/block.c b/block.c
index eb8158ac33b2f26cb42191d1fe2601ac2ab98820..a99e6d85090a0749e07080f81e81e95cfc8c42e1 100644
--- a/block.c
+++ b/block.c
@@ -73,8 +73,7 @@ struct BdrvDirtyBitmap {
 
 #define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
 
-static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
-    QTAILQ_HEAD_INITIALIZER(bdrv_states);
+struct BdrvStates bdrv_states = QTAILQ_HEAD_INITIALIZER(bdrv_states);
 
 static QTAILQ_HEAD(, BlockDriverState) graph_bdrv_states =
     QTAILQ_HEAD_INITIALIZER(graph_bdrv_states);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 3ceeb5a940c4f20f539d9a5fd9bf9f11fd16c776..6a3f64da1213519e425c0d4abde92528dee3305a 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -473,6 +473,8 @@ extern BlockDriver bdrv_file;
 extern BlockDriver bdrv_raw;
 extern BlockDriver bdrv_qcow2;
 
+extern QTAILQ_HEAD(BdrvStates, BlockDriverState) bdrv_states;
+
 /**
  * bdrv_setup_io_funcs:
  *