diff --git a/common/array.hh b/common/array.hh
index b311719611d83ed8b679b31fe26d62ede7796804..fb2423ed113693883969c0c8723b14fb0610bfcb 100644
--- a/common/array.hh
+++ b/common/array.hh
@@ -113,7 +113,7 @@ namespace Dune
 
     //! export base type of array
     typedef T MemberType;
-    typedef T value_type;     // definition conforming to STL
+    typedef T value_type;   // definition conforming to STL
 
     /** \brief Print contents of the array to cout.
      *