diff --git a/qemu-img.c b/qemu-img.c
index 41ff13b..732f889 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -728,9 +728,9 @@
         if (bdi.cluster_size != 0)
             printf("cluster_size: %d\n", bdi.cluster_size);
         if (bdi.highest_alloc)
-            printf("highest_alloc: %ld\n", bdi.highest_alloc);
+            printf("highest_alloc: %" PRId64 "\n", bdi.highest_alloc);
         if (bdi.num_free_bytes)
-            printf("num_free_bytes: %ld\n", bdi.num_free_bytes);
+            printf("num_free_bytes: %" PRId64 "\n", bdi.num_free_bytes);
     }
     bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
     if (backing_filename[0] != '\0') {