diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 8e622bb52f7a..d1a0e2c521d7 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -799,6 +799,7 @@ static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 	/* copy and convert to ebcdic */
 	memcpy(ipb->hdr.loadparm, buf, lp_len);
 	ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
+	ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
 	return len;
 }