diff --git a/include/libopencm3/usb/microsoft.h b/include/libopencm3/usb/microsoft.h
new file mode 100644
index 00000000..d81879ed
--- /dev/null
+++ b/include/libopencm3/usb/microsoft.h
@@ -0,0 +1,81 @@
+/** @defgroup usb_microsoft_defines USB Microsoft OS Descriptors Type Definitions
+
+@brief <b>Defined Constants and Types for the USB Microsoft OS Descriptors Type Definitions</b>
+
+@ingroup USB_defines
+
+@version 1.0.0
+
+@author @htmlonly &copy; @endhtmlonly 2022
+Rachel Mant <git@dragonmux.network>
+
+@date 11 August 2022
+
+LGPL License Terms @ref lgpl_license
+*/
+
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2022 Rachel Mant <git@dragonmux.network>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**@{*/
+
+#ifndef __MICROSOFT_H
+#define __MICROSOFT_H
+
+#include <libopencm3/usb/bos.h>
+
+enum microsoft_req {
+	MICROSOFT_GET_DESCRIPTOR_SET = 7,
+	MICROSOFT_SET_ALTERNATE_ENUM = 8,
+};
+
+enum microsoft_os_descriptor_types {
+	MICROSOFT_OS_SET_HEADER = 0,
+	MICROSOFT_OS_SUBSET_HEADER_CONFIGURATION = 1,
+	MICROSOFT_OS_SUBSET_HEADER_FUNCTION = 2,
+	MICROSOFT_OS_FEATURE_COMPATIBLE_ID = 3,
+	MICROSOFT_OS_FEATURE_REG_PROPERTY = 4,
+	MICROSOFT_OS_FEATURE_MIN_RESUME_TIME = 5,
+	MICROSOFT_OS_FEATURE_MODEL_ID = 6,
+	MICROSOFT_OS_FEATURE_CCGP_DEVICE = 7,
+	MICROSOFT_OS_FEATURE_VENDOR_REVISION = 8,
+};
+
+enum microsoft_registry_types {
+	REG_SZ = 1,
+	REG_EXPAND_SZ = 2,
+	REG_BINARY = 3,
+	REG_DWORD_LITTLE_ENDIAN = 4,
+	REG_DWORD_BIG_ENDIAN = 5,
+	REG_LINK = 6,
+	REG_MULTI_SZ = 7,
+};
+
+#define MICROSOFT_OS_DESCRIPTOR_PLATFORM_CAPABILITY_ID \
+{ \
+	0xd8dd60dfU, \
+	0x4589U, \
+	0x4cc7U, \
+	0xd29cU, \
+	{0x65U, 0x9dU, 0x9eU, 0x64U, 0x8aU, 0x9fU}, \
+}
+
+#endif
+
+/**@}*/