diff --git a/dumux/io/loadsolution.hh b/dumux/io/loadsolution.hh
index 224254c1cb6731b203779140913080b9a76bfc79..c9770b996c8ae789cc8b5263ce327403db4e6346 100644
--- a/dumux/io/loadsolution.hh
+++ b/dumux/io/loadsolution.hh
@@ -66,7 +66,7 @@ public:
     bool contains(int dim, int cd) const
     { return cd == codim; }
 
-    bool fixedsize(int dim, int cd) const
+    bool fixedSize(int dim, int cd) const
     { return true; }
 
     template<class EntityType>
diff --git a/dumux/linear/parallelhelpers.hh b/dumux/linear/parallelhelpers.hh
index 1f825e3ddf32cb930a4a1eb52c214a5e405a2985..38624a968ebec123be8c1e6518db232a3dff8f22 100644
--- a/dumux/linear/parallelhelpers.hh
+++ b/dumux/linear/parallelhelpers.hh
@@ -65,7 +65,7 @@ class ParallelISTLHelper
         bool contains(int dim, int codim) const
         { return dofCodim == codim; }
 
-        bool fixedsize(int dim, int codim) const
+        bool fixedSize(int dim, int codim) const
         { return true; }
 
         template<class EntityType>
@@ -91,7 +91,7 @@ class ParallelISTLHelper
     public:
         using DataType = typename V::block_type;
         using BaseGatherScatter::contains;
-        using BaseGatherScatter::fixedsize;
+        using BaseGatherScatter::fixedSize;
         using BaseGatherScatter::size;
 
         ConsistencyBoxGatherScatter(V& container, const DofMapper& mapper)
@@ -129,7 +129,7 @@ class ParallelISTLHelper
     public:
         using DataType = std::size_t;
         using BaseGatherScatter::contains;
-        using BaseGatherScatter::fixedsize;
+        using BaseGatherScatter::fixedSize;
         using BaseGatherScatter::size;
 
         GhostGatherScatter(std::vector<std::size_t>& ranks, const DofMapper& mapper)
@@ -171,7 +171,7 @@ class ParallelISTLHelper
     public:
         using DataType = std::size_t;
         using BaseGatherScatter::contains;
-        using BaseGatherScatter::fixedsize;
+        using BaseGatherScatter::fixedSize;
         using BaseGatherScatter::size;
 
         InteriorBorderGatherScatter(std::vector<std::size_t>& ranks, const DofMapper& mapper)
@@ -210,7 +210,7 @@ class ParallelISTLHelper
     {
         using DataType = int;
         using BaseGatherScatter::contains;
-        using BaseGatherScatter::fixedsize;
+        using BaseGatherScatter::fixedSize;
         using BaseGatherScatter::size;
 
         NeighbourGatherScatter(const DofMapper& mapper, int rank, std::set<int>& neighbours)
@@ -246,7 +246,7 @@ class ParallelISTLHelper
     {
         using DataType = int;
         using BaseGatherScatter::contains;
-        using BaseGatherScatter::fixedsize;
+        using BaseGatherScatter::fixedSize;
         using BaseGatherScatter::size;
 
         SharedGatherScatter(std::vector<int>& shared, const DofMapper& mapper)
@@ -283,7 +283,7 @@ class ParallelISTLHelper
     {
         using DataType = GlobalIndex;
         using BaseGatherScatter::contains;
-        using BaseGatherScatter::fixedsize;
+        using BaseGatherScatter::fixedSize;
         using BaseGatherScatter::size;
 
         GlobalIndexGatherScatter(std::vector<GlobalIndex>& globalIndices, const DofMapper& mapper)
@@ -539,7 +539,7 @@ class ParallelMatrixHelper
         /*!
          * \brief Returns true if size of data per entity of given dim and codim is a constant
          */
-        bool fixedsize (int dim, int codim) const
+        bool fixedSize (int dim, int codim) const
         { return false; }
 
         /*!
@@ -636,7 +636,7 @@ class ParallelMatrixHelper
         /*!
          * \brief Returns true if size of data per entity of given dim and codim is a constant
          */
-        bool fixedsize(int dim, int codim) const
+        bool fixedSize(int dim, int codim) const
         { return false; }
 
         /*!
diff --git a/dumux/parallel/vectorcommdatahandle.hh b/dumux/parallel/vectorcommdatahandle.hh
index 0bcfa538d85eab50854750e2ac4a67844c56801e..21f5ffd9892f7b1c58e885c295a23b242b0f76bf 100644
--- a/dumux/parallel/vectorcommdatahandle.hh
+++ b/dumux/parallel/vectorcommdatahandle.hh
@@ -88,7 +88,7 @@ public:
   { return (codim == entityCodim); }
 
   //! returns true if size per entity of given dim and codim is a constant
-  bool fixedsize(int dim, int codim) const
+  bool fixedSize(int dim, int codim) const
   { return true; }
 
   /*!
diff --git a/test/io/gridmanager/gridmanagertests.hh b/test/io/gridmanager/gridmanagertests.hh
index 9e6da34baefee786a3b62a8866fe6bbce2ff943d..7dbbc38f24faafdd7f031bdd24521c54c610bfb7 100644
--- a/test/io/gridmanager/gridmanagertests.hh
+++ b/test/io/gridmanager/gridmanagertests.hh
@@ -57,7 +57,7 @@ public:
         return codim == dim;
     }
 
-    bool fixedsize(int dim, int codim) const
+    bool fixedSize(int dim, int codim) const
     {
         // for each vertex we communicate a single field vector which
         // has a fixed size