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-rw-r--r--include/sysemu/block-backend-io.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h
index 8bf1296105..b048476a47 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -129,7 +129,7 @@ static inline int coroutine_fn blk_co_pread(BlockBackend *blk, int64_t offset,
 }
 
 static inline int coroutine_fn blk_co_pwrite(BlockBackend *blk, int64_t offset,
-                                             int64_t bytes, void *buf,
+                                             int64_t bytes, const void *buf,
                                              BdrvRequestFlags flags)
 {
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);