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-rw-r--r--block/copy-before-write.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/copy-before-write.c b/block/copy-before-write.c
index cd65524e26..853e01a1eb 100644
--- a/block/copy-before-write.c
+++ b/block/copy-before-write.c
@@ -43,7 +43,7 @@ typedef struct BDRVCopyBeforeWriteState {
     BlockCopyState *bcs;
     BdrvChild *target;
     OnCbwError on_cbw_error;
-    uint32_t cbw_timeout_ns;
+    uint64_t cbw_timeout_ns;
     bool discard_source;
 
     /*