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diff --git a/source/lang/serialusb.rst b/source/lang/serialusb.rst
index 9beee82..af3a7e0 100644
--- a/source/lang/serialusb.rst
+++ b/source/lang/serialusb.rst
@@ -71,6 +71,8 @@ world!")``.
Returns the number of bytes available for reading.
+.. _lang-serialusb-read:
+
.. cpp:function:: unsigned char USBSerial::read()
Returns the next available, unread character. If there are no