diff --git a/timeseriesviewer/plotstyling.py b/timeseriesviewer/plotstyling.py
index 9464a5620436e4d5112783f14d9488e4a039d545..a384efc4f72455106bf52c52bcdb2abb5452db81 100644
--- a/timeseriesviewer/plotstyling.py
+++ b/timeseriesviewer/plotstyling.py
@@ -86,19 +86,43 @@ class PlotStyle(QObject):
         p.end()
         return QIcon(pm)
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __eq__(self, other):
+        if not isinstance(other, PlotStyle):
+            return False
+        for k in self.__dict__.keys():
+            if not self.__dict__[k] == other.__dict__[k]:
+                return False
+        return True
+
     def __reduce_ex__(self, protocol):
 
         return self.__class__, (), self.__getstate__()
 
     def __getstate__(self):
-        result = dict()
-        for k, i in self.__dict__.items():
-            t = type(i)
-            if t in [str, int, float, QColor]:
-                result[k] = i
+        result = self.__dict__.copy()
+
+        ba = QByteArray()
+        s = QDataStream(ba, QIODevice.WriteOnly)
+        s.writeQVariant(self.linePen)
+        s.writeQVariant(self.markerPen)
+        s.writeQVariant(self.markerBrush)
+        result['__tmp__'] = ba
+        result.pop('linePen')
+        result.pop('markerPen')
+        result.pop('markerBrush')
+
         return result
 
     def __setstate__(self, state):
+        ba = state['__tmp__']
+        s = QDataStream(ba)
+        state['linePen'] = s.readQVariant()
+        state['markerPen'] = s.readQVariant()
+        state['markerBrush'] = s.readQVariant()
+
         self.__dict__.update(state)
 
 class PlotStyleWidget(QWidget, loadUi('plotstylewidget.ui')):
@@ -347,7 +371,8 @@ if __name__ == '__main__':
     import pickle
     s1 = PlotStyle()
     s2 = pickle.loads(pickle.dumps(s1))
-    assert s1 == s2
+    assert isinstance(s2, PlotStyle)
+
     btn = PlotStyleButton()
     btn.show()
     qgsApp.exec_()