diff --git a/block/raw-format.c b/block/raw-format.c
index 3451378..a2485926 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -289,7 +289,7 @@
 }
 
 static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
-                                             int64_t offset, int bytes,
+                                             int64_t offset, int64_t bytes,
                                              BdrvRequestFlags flags)
 {
     int ret;