diff --git a/CMakeLists.txt b/CMakeLists.txt
index 25fa9986f..575686450 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -124,6 +124,7 @@ pybind11_add_module(${PROJECT_NAME}
     src/simsoptpp/regular_grid_interpolant_3d_py.cpp
     src/simsoptpp/tracing.cpp 
     src/simsoptpp/python_boozermagneticfield.cpp
+    src/simsoptpp/python_magneticfield.cpp
     src/simsoptpp/boozerradialinterpolant.cpp
     )