diff --git a/doc/sphinx/cython/zerodim.rst b/doc/sphinx/cython/zerodim.rst
index 7b77507f8..1272d7ff7 100644
--- a/doc/sphinx/cython/zerodim.rst
+++ b/doc/sphinx/cython/zerodim.rst
@@ -24,7 +24,9 @@ Reactors
 
 .. autoclass:: Reservoir
 .. autoclass:: Reactor
+.. autoclass:: IdealGasReactor
 .. autoclass:: ConstPressureReactor
+.. autoclass:: IdealGasConstPressureReactor
 .. autoclass:: FlowReactor
 
 Flow Controllers