diff --git a/make_dyadic_vectors.cc b/make_dyadic_vectors.cc
index ad62ede4cfd714037fa289b17249499d6b678568..2fd0934fa711fbc86f135a1e5d991efddf8b5392 100644
--- a/make_dyadic_vectors.cc
+++ b/make_dyadic_vectors.cc
@@ -16,6 +16,7 @@ int main ( int argc, char **argv ){
   read_volume4D(phs,argv[2]);
   volume4D<float> dyadic_vecs(ths.xsize(),ths.ysize(),ths.zsize(),3);
   dyadic_vecs=0;
+  copybasicproperties(ths,dyadic_vecs);
   SymmetricMatrix dyad(3);dyad=0;
   ColumnVector dir(3);