--- a/src/app/virtualbox/src/VBox/Devices/Storage/DrvVD.cpp
+++ b/src/app/virtualbox/src/VBox/Devices/Storage/DrvVD.cpp
@@ -4611,7 +4611,7 @@
 #endif /* VBOX_PERIODIC_FLUSH */
 
 #ifdef VBOX_IGNORE_FLUSH
-            rc = CFGMR3QueryBoolDef(pCfg, "IgnoreFlush", &pThis->fIgnoreFlush, true);
+            rc = CFGMR3QueryBoolDef(pCfg, "IgnoreFlush", &pThis->fIgnoreFlush, false);
             if (RT_FAILURE(rc))
                 return PDMDRV_SET_ERROR(pDrvIns, rc, N_("Failed to query \"IgnoreFlush\" from the config"));