Index: uspace/lib/usbdev/src/request.c
===================================================================
--- uspace/lib/usbdev/src/request.c	(revision 3f44312e5bf1bf8a8d8349900eb281a7310ef0c3)
+++ uspace/lib/usbdev/src/request.c	(revision b5c92d7d57016ed7f4aba8557f717a096f15cbc3)
@@ -843,6 +843,8 @@
 		return EINVAL;
 	}
-	return usb_request_clear_endpoint_halt(ctrl_pipe,
-	    target_pipe->desc.endpoint_no);
+
+	uint16_t index = target_pipe->desc.endpoint_no;
+	index |= (target_pipe->desc.direction == USB_DIRECTION_IN) << 7;
+	return usb_request_clear_endpoint_halt(ctrl_pipe, index);
 }