diff --git a/block/io.c b/block/io.c
index 3846e2ed96..18d345a87a 100644
--- a/block/io.c
+++ b/block/io.c
@@ -3104,7 +3104,7 @@ int coroutine_fn bdrv_co_pdiscard(BdrvChild *child, int64_t offset,
         goto out;
     }
 
-    max_pdiscard = QEMU_ALIGN_DOWN(MIN_NON_ZERO(bs->bl.max_pdiscard, INT_MAX),
+    max_pdiscard = QEMU_ALIGN_DOWN(MIN_NON_ZERO(bs->bl.max_pdiscard, INT64_MAX),
                                    align);
     assert(max_pdiscard >= bs->bl.request_alignment);