diff --git a/dumux/decoupled/common/onemodelproblem.hh b/dumux/decoupled/common/onemodelproblem.hh
index 9c41b61513f70f2dac155ad63210fdfd59ea1b32..fba1d07c495ecfc3886d9163b7481ebbdb4fede4 100644
--- a/dumux/decoupled/common/onemodelproblem.hh
+++ b/dumux/decoupled/common/onemodelproblem.hh
@@ -385,7 +385,7 @@ public:
      * \brief Sets the current time step size [seconds].
      */
     void setTimeStepSize(Scalar dt)
-    { return timeManager().setTimeStepSize(dt); }
+    { timeManager().setTimeStepSize(dt); }
 
     /*!
      * \brief Called by Dumux::TimeManager whenever a solution for a