diff --git a/src/arch/i386/boot/acpi.c b/src/arch/i386/boot/acpi.c
index 5159766..baff4f0 100644
--- a/src/arch/i386/boot/acpi.c
+++ b/src/arch/i386/boot/acpi.c
@@ -341,7 +341,7 @@
 	memset((void *)hpet, 0, sizeof(acpi_hpet_t));
 	
 	/* fill out header fields */
-	memcpy(header->signature, HPET_NAME, 4);
+	memcpy(header->signature, "HPET", 4);
 	memcpy(header->oem_id, OEM_ID, 6);
 	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
 	memcpy(header->asl_compiler_id, ASLC, 4);