diff --git a/arch/x86/include/asm/acpi_table.h b/arch/x86/include/asm/acpi_table.h
index 44f528e..b450c43 100644
--- a/arch/x86/include/asm/acpi_table.h
+++ b/arch/x86/include/asm/acpi_table.h
@@ -31,12 +31,6 @@
 	u8 reserved[3];
 };
 
-#define ACPI_REV_ACPI_1_0	1
-#define ACPI_REV_ACPI_2_0	1
-#define ACPI_REV_ACPI_3_0	2
-#define ACPI_REV_ACPI_4_0	3
-#define ACPI_REV_ACPI_5_0	5
-
 /* Generic ACPI header, provided by (almost) all tables */
 struct acpi_table_header {
 	char signature[4];	/* ACPI signature (4 ASCII characters) */
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 9cdea93..8fef9b8 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -67,9 +67,7 @@
 	/* Fill out header fields */
 	acpi_fill_header(header, "RSDT");
 	header->length = sizeof(struct acpi_rsdt);
-
-	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
-	header->revision = ACPI_REV_ACPI_2_0;
+	header->revision = 1;
 
 	/* Entries are filled in later, we come with an empty set */
 
@@ -85,9 +83,7 @@
 	/* Fill out header fields */
 	acpi_fill_header(header, "XSDT");
 	header->length = sizeof(struct acpi_xsdt);
-
-	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
-	header->revision = ACPI_REV_ACPI_2_0;
+	header->revision = 1;
 
 	/* Entries are filled in later, we come with an empty set */
 
@@ -248,9 +244,7 @@
 	/* Fill out header fields */
 	acpi_fill_header(header, "APIC");
 	header->length = sizeof(struct acpi_madt);
-
-	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
-	header->revision = ACPI_REV_ACPI_2_0;
+	header->revision = 4;
 
 	madt->lapic_addr = LAPIC_DEFAULT_BASE;
 	madt->flags = ACPI_MADT_PCAT_COMPAT;
@@ -296,9 +290,7 @@
 	/* Fill out header fields */
 	acpi_fill_header(header, "MCFG");
 	header->length = sizeof(struct acpi_mcfg);
-
-	/* ACPI 1.0/2.0: 1, ACPI 3.0: 2, ACPI 4.0: 3 */
-	header->revision = ACPI_REV_ACPI_2_0;
+	header->revision = 1;
 
 	current = acpi_fill_mcfg(current);