diff --git a/src/opm/parser/eclipse/Python/PyRunModule.hpp b/src/opm/parser/eclipse/Python/PyRunModule.hpp
index 468b8808f..36dd1a817 100644
--- a/src/opm/parser/eclipse/Python/PyRunModule.hpp
+++ b/src/opm/parser/eclipse/Python/PyRunModule.hpp
@@ -38,7 +38,7 @@ class Schedule;
 class SummaryState;
 
 
-class  PyRunModule {
+class __attribute__((visibility("default"))) PyRunModule {
 public:
     PyRunModule(std::shared_ptr<const Python> python, const std::string& fname);