diff --git a/ChangeLog b/ChangeLog
index 34a092ca2..1c21262b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-10-16  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/commands/acpihalt.c (skip_ext_op): Skip index field op.
+	* include/grub/acpi.h (GRUB_ACPI_EXTOPCODE_INDEX_FIELD_OP): New
+	enum value.
+
 2010-10-16  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/commands/acpihalt.c (get_sleep_type): Accept \_S5_ as
diff --git a/grub-core/commands/acpihalt.c b/grub-core/commands/acpihalt.c
index d28a74323..2789e2eca 100644
--- a/grub-core/commands/acpihalt.c
+++ b/grub-core/commands/acpihalt.c
@@ -142,6 +142,7 @@ skip_ext_op (const grub_uint8_t *ptr, const grub_uint8_t *end)
 	return 0;
       break;
     case GRUB_ACPI_EXTOPCODE_FIELD_OP:
+    case GRUB_ACPI_EXTOPCODE_INDEX_FIELD_OP:
       ptr++;
       ptr += decode_length (ptr, 0);
       break;
diff --git a/include/grub/acpi.h b/include/grub/acpi.h
index c7ab82dad..c843a0621 100644
--- a/include/grub/acpi.h
+++ b/include/grub/acpi.h
@@ -169,7 +169,8 @@ enum
   {
     GRUB_ACPI_EXTOPCODE_MUTEX = 0x01,
     GRUB_ACPI_EXTOPCODE_OPERATION_REGION = 0x80,
-    GRUB_ACPI_EXTOPCODE_FIELD_OP = 0x81
+    GRUB_ACPI_EXTOPCODE_FIELD_OP = 0x81,
+    GRUB_ACPI_EXTOPCODE_INDEX_FIELD_OP = 0x86,
   };
 
 #endif /* ! GRUB_ACPI_HEADER */