diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index f37c98cff9aab3601891a32181fff1fd9b889c65..854ee7f9f94fa539e56525fbc77eec84ed60653d 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -3067,8 +3067,7 @@ int qemuMonitorTextBlockJob(qemuMonitorPtr mon,
         ret = virAsprintf(&cmd, "%s", cmd_name);
     } else if (mode == BLOCK_JOB_SPEED) {
         cmd_name = "block_job_set_speed";
-        ret = virAsprintf(&cmd, "%s %s %llu", cmd_name, device,
-                          bandwidth * 1024ULL * 1024ULL);
+        ret = virAsprintf(&cmd, "%s %s %luM", cmd_name, device, bandwidth);
     } else if (mode == BLOCK_JOB_PULL) {
         cmd_name = "block_stream";
         ret = virAsprintf(&cmd, "%s %s", cmd_name, device);