diff --git a/src/esostrategy.h b/src/esostrategy.h
index 036c7695..755c64ac 100644
--- a/src/esostrategy.h
+++ b/src/esostrategy.h
@@ -164,7 +164,7 @@ namespace libcmaes
      *        variable values for each step until termination.
      * @param pffunc a stream to file output function
      */
-    void set_plot_func(PlotFunc<TParameters,TSolutions> &pffunc) { _pffunc = pffunc; }
+    void set_plot_func(PlotFunc<TParameters,TSolutions> &pffunc) { if (!_parameters._full_fplot) _pffunc = pffunc; }
     
     /**
      * \brief returns numerical gradient of objective function at x.