diff --git a/dumux/io/staggeredvtkoutputmodule.hh b/dumux/io/staggeredvtkoutputmodule.hh
index cca5ddf6e79108acac09270c882a703a667d03f3..cb298c205776a934b875f42ffc647bed7a9da619 100644
--- a/dumux/io/staggeredvtkoutputmodule.hh
+++ b/dumux/io/staggeredvtkoutputmodule.hh
@@ -130,7 +130,7 @@ public:
     void addFaceField(const std::vector<DimVector>& v, const std::string& name)
     {
         if (v.size() == this->gridGeom_.gridView().size(1))
-                faceFieldVectorDataInfo_.emplace_back(v, name);
+            faceFieldVectorDataInfo_.emplace_back(v, name);
         else
             DUNE_THROW(Dune::RangeError, "Size mismatch of added field!");
     }