diff --git a/src/fourier/details/euclidian_transform.hpp b/src/fourier/details/euclidian_transform.hpp
index ba16815..d87e610 100644
--- a/src/fourier/details/euclidian_transform.hpp
+++ b/src/fourier/details/euclidian_transform.hpp
@@ -56,6 +56,7 @@ namespace CosmoTool
   public:
     EuclidianFourierTransform(const DimArray& dims, const std::vector<double>& L)
     {
+      realMap = 0;
       create_plan(dims, L);
     }