diff --git a/opm/simulators/flow/Main.hpp b/opm/simulators/flow/Main.hpp
index b351342c2..265098ff0 100644
--- a/opm/simulators/flow/Main.hpp
+++ b/opm/simulators/flow/Main.hpp
@@ -52,6 +52,7 @@
 #include <opm/input/eclipse/Parser/ErrorGuard.hpp>
 #include <opm/input/eclipse/Parser/Parser.hpp>
 #include <opm/input/eclipse/Parser/ParseContext.hpp>
+#include <opm/input/eclipse/Python/Python.hpp>
 #include <opm/input/eclipse/EclipseState/EclipseState.hpp>
 #include <opm/input/eclipse/Schedule/ArrayDimChecker.hpp>
 #include <opm/input/eclipse/Schedule/UDQ/UDQState.hpp>