diff --git a/include/fintamath/core/CoreUtils.hpp b/include/fintamath/core/CoreUtils.hpp
index 5d03f73ed..3a7f2bb05 100644
--- a/include/fintamath/core/CoreUtils.hpp
+++ b/include/fintamath/core/CoreUtils.hpp
@@ -3,6 +3,12 @@
 #include <concepts>
 #include <functional>
 
+#ifdef WIN32
+#define FINTAMATH_API __declspec(dllexport)
+#else
+#define FINTAMATH_API
+#endif
+
 namespace fintamath {
 
 template <typename From, typename To>
diff --git a/include/fintamath/core/MathObjectBody.hpp b/include/fintamath/core/MathObjectBody.hpp
index 8918b4b83..cf152892b 100644
--- a/include/fintamath/core/MathObjectBody.hpp
+++ b/include/fintamath/core/MathObjectBody.hpp
@@ -19,7 +19,10 @@ public:                                               \
 private:                                                        \
   using Class##Parser = detail::Parser<std::unique_ptr<Class>>; \
                                                                 \
-  static Class##Parser &getParser();                            \
+  FINTAMATH_API static Class##Parser &getParser() {             \
+    FINTAMATH_API static Class##Parser parser;                  \
+    return parser;                                              \
+  }                                                             \
                                                                 \
 public:                                                         \
   static auto parse(std::string str) {                          \
@@ -38,8 +41,4 @@ public:                                                         \
                                                                 \
 private:
 
-#define FINTAMATH_PARENT_CLASS_IMPLEMENTATION(Class) \
-  Class::Class##Parser &Class::getParser() {         \
-    static Class##Parser parser;                     \
-    return parser;                                   \
-  }
+#define FINTAMATH_PARENT_CLASS_IMPLEMENTATION(Class)