diff --git a/dune/dorie/interface/base_simulation.hh b/dune/dorie/interface/base_simulation.hh
index af96641fa580163390e5f7a26c8060297d2cba9f..868ea0c6ea5dd8effef2710b288973235668f141 100644
--- a/dune/dorie/interface/base_simulation.hh
+++ b/dune/dorie/interface/base_simulation.hh
@@ -138,7 +138,9 @@ public:
   virtual void preStep() {};
 
   /**
-   * @brief      Performs one steps in direction to endTime()
+   * @brief      Performs one steps in direction to endTime(). The time-step
+   *             should never result on a bigger step than the one suggested
+   *             in suggestTimestep().
    */
   virtual void step() = 0;