diff --git a/pc-bios/s390-ccw/dasd-ipl.c b/pc-bios/s390-ccw/dasd-ipl.c
index 0fc879bb8e..71cbae2f16 100644
--- a/pc-bios/s390-ccw/dasd-ipl.c
+++ b/pc-bios/s390-ccw/dasd-ipl.c
@@ -100,6 +100,9 @@ static void make_readipl(void)
 {
     Ccw0 *ccwIplRead = (Ccw0 *)0x00;
 
+    /* Clear out any existing data */
+    memset(ccwIplRead, 0, sizeof(Ccw0));
+
     /* Create Read IPL ccw at address 0 */
     ccwIplRead->cmd_code = CCW_CMD_READ_IPL;
     ccwIplRead->cda = 0x00; /* Read into address 0x00 in main memory */