diff --git a/beat/web/plotters/serializers.py b/beat/web/plotters/serializers.py
index dcfe8a4a235a6ba804535f6506fc40bd6ce263c3..d7f2b0b3df511a8b1e542c25d03a07105d3ac45e 100644
--- a/beat/web/plotters/serializers.py
+++ b/beat/web/plotters/serializers.py
@@ -39,6 +39,8 @@ from ..libraries.serializers import LibraryReferenceSerializer
 from django.utils.encoding import smart_text
 
 import beat.core.plotter
+import beat.core.plotterparameter
+
 import simplejson as json
 
 
@@ -95,7 +97,7 @@ class DefaultPlotterSerializer(DynamicFieldsSerializer):
 class PlotterCreationSerializer(CodeCreationSerializer):
     class Meta(CodeCreationSerializer.Meta):
         model = Plotter
-        beat_core_class = beat.core.plotter
+        beat_core_class = beat.core.plotter.Plotter
 
 
 # ----------------------------------------------------------
@@ -146,7 +148,7 @@ class PlotterParameterCreationSerializer(ContributionCreationSerializer):
             "description",
             "fork_of",
         ]
-        # beat_core_class = beat.core.PlotterParameter
+        beat_core_class = beat.core.plotterparameter.Plotterparameter
 
     def create(self, validated_data):
         plotterparameter = None