diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index b7a7cbd3a5..19798d0e77 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -1051,7 +1051,7 @@ struct BlockDriverState {
     /*
      * Flags honored during pread
      */
-    unsigned int supported_read_flags;
+    BdrvRequestFlags supported_read_flags;
     /*
      * Flags honored during pwrite (so far: BDRV_REQ_FUA,
      * BDRV_REQ_WRITE_UNCHANGED).
@@ -1069,12 +1069,12 @@ struct BlockDriverState {
      * flag), or they have to explicitly take the WRITE permission for
      * their children.
      */
-    unsigned int supported_write_flags;
+    BdrvRequestFlags supported_write_flags;
     /*
      * Flags honored during pwrite_zeroes (so far: BDRV_REQ_FUA,
      * BDRV_REQ_MAY_UNMAP, BDRV_REQ_WRITE_UNCHANGED)
      */
-    unsigned int supported_zero_flags;
+    BdrvRequestFlags supported_zero_flags;
     /*
      * Flags honoured during truncate (so far: BDRV_REQ_ZERO_WRITE).
      *
@@ -1082,7 +1082,7 @@ struct BlockDriverState {
      * that any added space reads as all zeros. If this can't be guaranteed,
      * the operation must fail.
      */
-    unsigned int supported_truncate_flags;
+    BdrvRequestFlags supported_truncate_flags;
 
     /* the following member gives a name to every node on the bs graph. */
     char node_name[32];