diff --git a/block-migration.c b/block-migration.c
index 8218bac09c..576e55a6a3 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -140,7 +140,7 @@ static inline void add_avg_read_time(int64_t time)
 static inline long double compute_read_bwidth(void)
 {
     assert(block_mig_state.total_time != 0);
-    return  (block_mig_state.reads * BLOCK_SIZE)/ block_mig_state.total_time;
+    return (block_mig_state.reads / block_mig_state.total_time) * BLOCK_SIZE;
 }
 
 static int bmds_aio_inflight(BlkMigDevState *bmds, int64_t sector)