diff --git a/documentation/conf.py b/documentation/conf.py
index 9b5f555117..998c5548af 100644
--- a/documentation/conf.py
+++ b/documentation/conf.py
@@ -448,6 +448,7 @@ def install_doxygen():
     "std::unique_ptr< amici::Solver >": "Solver",
     "amici::realtype const": "float",
     "amici::realtype": "float",
+    "int const": "int",
 }
 
 vector_types = {