diff --git a/common/typetraits.hh b/common/typetraits.hh
index 409315e3f504572a820d08eaba2eec5ee868fa2e..5804e3d54985b3bd41d634e58a332a2ca622d0cb 100644
--- a/common/typetraits.hh
+++ b/common/typetraits.hh
@@ -134,7 +134,7 @@ namespace Dune
       /** @brief True if the conversion exists. */
       exists =  sizeof(test(makeFrom())) == sizeof(Small),
       /** @brief Wether the conversion exists in both ways. */
-      existsTowWay = exists && Conversion<To,From>::exists,
+      isTowWay = exists && Conversion<To,From>::exists,
       /** @brief True if To and From are the same type. */
       sameType = false
     };