diff --git a/Device/Data/LLData.h b/Device/Data/LLData.h
index 34b39a1e30fb4c3002417a2a7afb916ea130646d..8b5838db822de1103431a8bae27a8f2209447c7f 100644
--- a/Device/Data/LLData.h
+++ b/Device/Data/LLData.h
@@ -12,19 +12,18 @@
 //
 //  ************************************************************************************************
 
-#ifdef SWIG
-#error no need to expose this header to Swig
-#endif
-
 #ifndef USER_API
 #ifndef BORNAGAIN_DEVICE_DATA_LLDATA_H
 #define BORNAGAIN_DEVICE_DATA_LLDATA_H
 
-#include "Base/Vector/EigenCore.h"
 #include <algorithm>
 #include <limits>
 #include <numeric>
 
+#ifndef SWIG
+#include "Base/Vector/EigenCore.h"
+#endif
+
 //! Template class to store data of any type in multi-dimensional space (low-level).
 
 template <class T>
@@ -75,6 +74,8 @@ template <>
 Eigen::Matrix2d LLData<Eigen::Matrix2d>::getZeroElement() const;
 #endif
 
+#ifndef SWIG
+
 // Global helper functions for arithmetic
 template <class T>
 LLData<T> operator+(const LLData<T>& left, const LLData<T>& right);
@@ -314,5 +315,7 @@ bool HaveSameDimensions(const LLData<T>& left, const LLData<T>& right)
     return true;
 }
 
+#endif // SWIG
+
 #endif // BORNAGAIN_DEVICE_DATA_LLDATA_H
 #endif // USER_API