diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a36c3487244a00a0edb4d5d6b1e1bf20ee9651ad..2fde15b4a001ebe1b68edf63260b6b784fdfb88d 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -12011,9 +12011,9 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
         qemuDomainObjEnterMonitorWithDriver(driver, vm);
         ret = qemuMonitorSetBlockIoThrottle(priv->mon, device, &info);
         qemuDomainObjExitMonitorWithDriver(driver, vm);
-        vm->def->disks[idx]->blkdeviotune = info;
         if (ret < 0)
             goto endjob;
+        vm->def->disks[idx]->blkdeviotune = info;
     }
 
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {