diff --git a/dumux/common/timemanager.hh b/dumux/common/timemanager.hh
index d1f59950d4a0f2b9b96767a062b61ffe657b17ad..23ba58b6c756445b14c38a1bff47ceaf5c510cc6 100644
--- a/dumux/common/timemanager.hh
+++ b/dumux/common/timemanager.hh
@@ -180,7 +180,7 @@ public:
     /*!
      * \brief Returns the current wall time (cpu time).
      */
-    double wallTime() const
+    Scalar wallTime() const
     {  return timer_.elapsed(); }
 
     /*!