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diff --git a/at91lib/usb/common/core/USBInterfaceDescriptor.h b/at91lib/usb/common/core/USBInterfaceDescriptor.h
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+++ b/at91lib/usb/common/core/USBInterfaceDescriptor.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/**
+ \unit
+
+ !!!Purpose
+
+    Definition of a class for manipulating USB interface descriptors.
+
+ !!!Usage
+
+    - Declare USBInterfaceDescriptor instance as a part of the configuration
+      descriptors of a USB device.
+
+*/
+
+#ifndef USBINTERFACEDESCRIPTOR_H
+#define USBINTERFACEDESCRIPTOR_H
+
+//------------------------------------------------------------------------------
+//         Types
+//------------------------------------------------------------------------------
+
+#ifdef __ICCARM__          // IAR
+#pragma pack(1)            // IAR
+#define __attribute__(...) // IAR
+#endif                     // IAR
+
+//------------------------------------------------------------------------------
+/// USB standard interface descriptor structure.
+//------------------------------------------------------------------------------
+typedef struct {
+
+   /// Size of the descriptor in bytes.
+   unsigned char bLength;
+   /// Descriptor type (USBGenericDescriptor_INTERFACE).
+   unsigned char bDescriptorType;
+   /// Number of the interface in its configuration.
+   unsigned char bInterfaceNumber;
+   /// Value to select this alternate interface setting.
+   unsigned char bAlternateSetting;
+   /// Number of endpoints used by the inteface (excluding endpoint 0).
+   unsigned char bNumEndpoints;
+   /// Interface class code.
+   unsigned char bInterfaceClass;
+   /// Interface subclass code.
+   unsigned char bInterfaceSubClass;
+   /// Interface protocol code.
+   unsigned char bInterfaceProtocol;
+   /// Index of the interface string descriptor.
+   unsigned char iInterface;
+                                    
+} __attribute__ ((packed)) USBInterfaceDescriptor; // GCC
+
+#ifdef __ICCARM__          // IAR
+#pragma pack()             // IAR
+#endif                     // IAR
+
+#endif //#ifndef USBINTERFACEDESCRIPTOR_H
+