diff --git a/include/firm/aes/ARM7/aes_util.h b/include/firm/aes/ARM7/aes_util.h
new file mode 100644
index 00000000..3f36a086
--- /dev/null
+++ b/include/firm/aes/ARM7/aes_util.h
@@ -0,0 +1,35 @@
+/*---------------------------------------------------------------------------*
+  Project:  TwlIPL - AES - include
+  File:     aes_util.h
+
+  Copyright 2007 Nintendo.  All rights reserved.
+
+  These coded instructions, statements, and computer programs contain
+  proprietary information of Nintendo of America Inc. and/or Nintendo
+  Company Ltd., and are protected by Federal copyright law.  They may
+  not be disclosed to third parties or copied or duplicated in any form,
+  in whole or in part, without the prior written consent of Nintendo.
+
+  $Date:: 2007-09-06$
+  $Rev$
+  $Author$
+ *---------------------------------------------------------------------------*/
+
+#ifndef TWL_AES_AES_UTIL_H_
+#define TWL_AES_AES_UTIL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*---------------------------------------------------------------------------*
+    �֐���`
+ *---------------------------------------------------------------------------*/
+void AESi_AddCounter(AESCounter* pCounter, u32 nums);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+/* TWL_AES_AES_UTIL_H_ */
+#endif