diff --git a/cosserat-continuum.cc b/cosserat-continuum.cc
index 9adffa55c0d8442c5a883ca20efed72cbb336d50..1a76d44cd31ae859e60fe202b117f3925c9daf3a 100644
--- a/cosserat-continuum.cc
+++ b/cosserat-continuum.cc
@@ -208,7 +208,7 @@ int main (int argc, char *argv[]) try
 
     shared_ptr<GridType> grid;
 
-    FieldVector<double,dim> lower, upper;
+    FieldVector<double,dim> lower(0), upper(1);
 
     if (parameterSet.get<bool>("structuredGrid")) {