diff --git a/ChangeLog b/ChangeLog
index 44663b91c..7d16e538d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-02-27  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* include/grub/efi/api.h (grub_efi_runtime_services): Add missing
+	const qualifier for vendor_guid.
+
 2012-02-27  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/efiemu/runtime/efiemu.c (efiemu_get_variable): Add missing
diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
index 6f857835b..26127dedd 100644
--- a/include/grub/efi/api.h
+++ b/include/grub/efi/api.h
@@ -1054,7 +1054,7 @@ struct grub_efi_runtime_services
 
   grub_efi_status_t
   (*get_variable) (grub_efi_char16_t *variable_name,
-		   grub_efi_guid_t *vendor_guid,
+		   const grub_efi_guid_t *vendor_guid,
 		   grub_efi_uint32_t *attributes,
 		   grub_efi_uintn_t *data_size,
 		   void *data);