diff --git a/drivers/interrupt_controller/intc_intel_vtd.c b/drivers/interrupt_controller/intc_intel_vtd.c
index 60082f9..f90c20d 100644
--- a/drivers/interrupt_controller/intc_intel_vtd.c
+++ b/drivers/interrupt_controller/intc_intel_vtd.c
@@ -82,24 +82,24 @@
 			  uint32_t flags)
 {
 	struct vtd_ictl_data *data = dev->data;
+	struct vtd_irte irte = { 0 };
 
-	memset(&data->irte[irte_idx], 0, sizeof(struct vtd_irte));
-
-	data->irte[irte_idx].l.vector = vector;
+	irte.l.vector = vector;
 
 	if (IS_ENABLED(CONFIG_X2APIC)) {
-		data->irte[irte_idx].l.dst_id = arch_curr_cpu()->id;
+		irte.l.dst_id = arch_curr_cpu()->id;
 	} else {
-		data->irte[irte_idx].l.dst_id = arch_curr_cpu()->id << 8;
+		irte.l.dst_id = arch_curr_cpu()->id << 8;
 	}
 
-	data->irte[irte_idx].l.trigger_mode =
-		(flags & IOAPIC_TRIGGER_MASK) >> 15;
-	data->irte[irte_idx].l.delivery_mode =
-		(flags & IOAPIC_DELIVERY_MODE_MASK) >> 8;
-	data->irte[irte_idx].l.dst_mode = 1;
-	data->irte[irte_idx].l.redirection_hint = 1;
-	data->irte[irte_idx].l.present = 1;
+	irte.l.trigger_mode = (flags & IOAPIC_TRIGGER_MASK) >> 15;
+	irte.l.delivery_mode = (flags & IOAPIC_DELIVERY_MODE_MASK) >> 8;
+	irte.l.dst_mode = 1;
+	irte.l.redirection_hint = 1;
+	irte.l.present = 1;
+
+	data->irte[irte_idx].low = irte.low;
+	data->irte[irte_idx].high = irte.high;
 
 	return 0;
 }
diff --git a/drivers/interrupt_controller/intc_intel_vtd.h b/drivers/interrupt_controller/intc_intel_vtd.h
index 894d7da..82ed093 100644
--- a/drivers/interrupt_controller/intc_intel_vtd.h
+++ b/drivers/interrupt_controller/intc_intel_vtd.h
@@ -17,27 +17,33 @@
 
 /* Interrupt Remapping Table Entry (IRTE) for Remapped Interrupts */
 struct vtd_irte {
-	struct {
-		uint64_t present		: 1;
-		uint64_t fpd			: 1;
-		uint64_t dst_mode		: 1;
-		uint64_t redirection_hint	: 1;
-		uint64_t trigger_mode		: 1;
-		uint64_t delivery_mode		: 3;
-		uint64_t available		: 4;
-		uint64_t _reserved_0		: 3;
-		uint64_t irte_mode		: 1;
-		uint64_t vector			: 8;
-		uint64_t _reserved_1		: 8;
-		uint64_t dst_id			: 32;
-	} l;
+	union {
+		struct vtd_irte_low {
+			uint64_t present		: 1;
+			uint64_t fpd			: 1;
+			uint64_t dst_mode		: 1;
+			uint64_t redirection_hint	: 1;
+			uint64_t trigger_mode		: 1;
+			uint64_t delivery_mode		: 3;
+			uint64_t available		: 4;
+			uint64_t _reserved_0		: 3;
+			uint64_t irte_mode		: 1;
+			uint64_t vector			: 8;
+			uint64_t _reserved_1		: 8;
+			uint64_t dst_id			: 32;
+		} l;
+		uint64_t low;
+	};
 
-	struct {
-		uint64_t src_id			: 16;
-		uint64_t src_id_qualifier	: 2;
-		uint64_t src_validation_type	: 2;
-		uint64_t _reserved		: 44;
-	} h;
+	union {
+		struct vtd_irte_high {
+			uint64_t src_id			: 16;
+			uint64_t src_id_qualifier	: 2;
+			uint64_t src_validation_type	: 2;
+			uint64_t _reserved		: 44;
+		} h;
+		uint64_t high;
+	};
 } __packed;
 
 /* The table must be 4KB aligned, which is exactly 256 entries.