diff --git a/hypervisor/arch/x86/guest/vlapic.c b/hypervisor/arch/x86/guest/vlapic.c
index da939951d..7e589e7c7 100644
--- a/hypervisor/arch/x86/guest/vlapic.c
+++ b/hypervisor/arch/x86/guest/vlapic.c
@@ -1420,7 +1420,7 @@ static int32_t vlapic_read(struct acrn_vlapic *vlapic, uint32_t offset_arg, uint
 	struct lapic_regs *lapic = &(vlapic->apic_page);
 	uint32_t i;
 	uint32_t offset = offset_arg;
-	*data = 0ULL;
+	*data = 0UL;
 
 	if (offset > sizeof(*lapic)) {
 		ret = -EACCES;
diff --git a/hypervisor/arch/x86/guest/vm_reset.c b/hypervisor/arch/x86/guest/vm_reset.c
index 6f417597e..87304197a 100644
--- a/hypervisor/arch/x86/guest/vm_reset.c
+++ b/hypervisor/arch/x86/guest/vm_reset.c
@@ -25,7 +25,7 @@ void triple_fault_shutdown_vm(struct acrn_vcpu *vcpu)
 		io_req->io_type = REQ_PORTIO;
 		io_req->reqs.pio.direction = REQUEST_WRITE;
 		io_req->reqs.pio.address = VIRTUAL_PM1A_CNT_ADDR;
-		io_req->reqs.pio.size = 2ULL;
+		io_req->reqs.pio.size = 2UL;
 		io_req->reqs.pio.value = (VIRTUAL_PM1A_SLP_EN | (5U << 10U));
 
 		/* Inject pm1a S5 request to SOS to shut down the guest */
diff --git a/hypervisor/arch/x86/seed/seed.c b/hypervisor/arch/x86/seed/seed.c
index 05c6e57fd..d3de607cb 100644
--- a/hypervisor/arch/x86/seed/seed.c
+++ b/hypervisor/arch/x86/seed/seed.c
@@ -102,7 +102,7 @@ void append_seed_arg(char *cmd_dst, bool vm_is_sos)
 
 	if ((cmd_dst != NULL) && vm_is_sos) {
 		for (i = 0U; seed_arg[i].str != NULL; i++) {
-			if (seed_arg[i].addr != 0ULL) {
+			if (seed_arg[i].addr != 0UL) {
 				(void)memset(buf, 0U, sizeof(buf));
 
 				snprintf(buf, sizeof(buf), "%s0x%X ", seed_arg[i].str,