When client-side USB redirection techniques redirect an interface as a simple device, multiple redirected interfaces can be combined on the server side into a single composite device. When redirecting an interface, the client-side proxy can include an interface hint identifying the interface number in the device arrival notification sent to the server-side agent. Upon receiving multiple device arrival notifications that each include an interface hint, the agent can recombine the appropriate information to generate composite device information which will represent a composite device that includes each interface. The agent can then provide this composite device information to the virtual bus driver to initiate the process of loading the appropriate drivers for the composite device. Accordingly, even though each redirected interface of the composite device is reported to the server-side agent individually, the operating system on the server will still see a composite device.