diff --git a/drivers/acpi/acpica/amlresrc.h b/drivers/acpi/acpica/amlresrc.h
index 48df447ef5bb..4e88f9fc2a28 100644
--- a/drivers/acpi/acpica/amlresrc.h
+++ b/drivers/acpi/acpica/amlresrc.h
@@ -261,7 +261,10 @@ struct aml_resource_address16 {
 struct aml_resource_extended_irq {
 	AML_RESOURCE_LARGE_HEADER_COMMON u8 flags;
 	u8 interrupt_count;
-	u32 interrupts[1];
+	union {
+		u32 interrupt;
+		 ACPI_FLEX_ARRAY(u32, interrupts);
+	};
 	/* res_source_index, res_source optional fields follow */
 };
 
diff --git a/include/acpi/acrestyp.h b/include/acpi/acrestyp.h
index 87d58afca79e..efef208b0324 100644
--- a/include/acpi/acrestyp.h
+++ b/include/acpi/acrestyp.h
@@ -142,7 +142,10 @@ struct acpi_resource_irq {
 	u8 shareable;
 	u8 wake_capable;
 	u8 interrupt_count;
-	u8 interrupts[1];
+	union {
+		u8 interrupt;
+		 ACPI_FLEX_ARRAY(u8, interrupts);
+	};
 };
 
 struct acpi_resource_dma {
@@ -335,7 +338,10 @@ struct acpi_resource_extended_irq {
 	u8 wake_capable;
 	u8 interrupt_count;
 	struct acpi_resource_source resource_source;
-	u32 interrupts[1];
+	union {
+		u32 interrupt;
+		 ACPI_FLEX_ARRAY(u32, interrupts);
+	};
 };
 
 struct acpi_resource_generic_register {