diff --git a/src/duneevaluate.cc b/src/duneevaluate.cc
index ec35d9ff28233ac875bf772818e5678f9fde0ede..d788ebf5e3454c1123380cc4d7a09d471e126b7a 100644
--- a/src/duneevaluate.cc
+++ b/src/duneevaluate.cc
@@ -16,7 +16,7 @@ DEFUN_DLD(duneevaluate, args, nargout, "duneevaluate(y)\n\
 Evaluate x -> 1/2<Ax,x> - <b,x> + H(|x|) at y using DUNE\n") {
   assert(args.length() == 1);
   assert(nargout <= 1);
-  ColumnVector point(args(0).matrix_value());
+  ColumnVector point(args(0).vector_value());
 
   int const dim = 2;
 
diff --git a/src/duneminimise.cc b/src/duneminimise.cc
index b7cc8a288da67d9cfb8e7222ae00dcc3dfd942b9..23e14f46ae356dcdd741e53008b323a00b3ca501 100644
--- a/src/duneminimise.cc
+++ b/src/duneminimise.cc
@@ -16,7 +16,7 @@ DEFUN_DLD(duneminimise, args, nargout, "duneminimise(y)\n\
 Make a minimisation step of x -> 1/2<Ax,x> - <b,x> + H(|x|) using DUNE starting at x\n") {
   assert(args.length() == 1);
   assert(nargout <= 1);
-  ColumnVector current(args(0).matrix_value());
+  ColumnVector current(args(0).vector_value());
 
   int const dim = 2;