diff --git a/dumux/io/plotmateriallaw3p.hh b/dumux/io/plotmateriallaw3p.hh
index 444fa69748bd42d5632d9e72e23c2c666bc6a9ec..e49b7d5bcf6aec70fb08682fb819d18254da1677 100644
--- a/dumux/io/plotmateriallaw3p.hh
+++ b/dumux/io/plotmateriallaw3p.hh
@@ -198,7 +198,7 @@ public:
         gnuplotpc_.setXlabel("wetting phase saturation [-]");
         gnuplotpc_.setYlabel("capillary pressure [Pa]");
         gnuplotpc_.addDataSetToPlot(st, pc, curveTitle + "_pcgn-St");
-        gnuplotpc_.plot("pcgn-St (St=Sw+Sn)");
+        gnuplotpc_.plot("pcgn-St");
     }