diff --git a/qiskit/circuit/classical/expr/__init__.py b/qiskit/circuit/classical/expr/__init__.py
index d0302aeb60bd..d2cd4bc5044e 100644
--- a/qiskit/circuit/classical/expr/__init__.py
+++ b/qiskit/circuit/classical/expr/__init__.py
@@ -104,6 +104,7 @@
 
 .. autofunction:: bit_and
 .. autofunction:: bit_or
+.. autofunction:: bit_xor
 .. autofunction:: logic_and
 .. autofunction:: logic_or
 .. autofunction:: equal