diff --git a/python/plugins/processing/algs/qgis/PointsInPolygon.py b/python/plugins/processing/algs/qgis/PointsInPolygon.py
index fc5c06530c5..0eba9c080c8 100644
--- a/python/plugins/processing/algs/qgis/PointsInPolygon.py
+++ b/python/plugins/processing/algs/qgis/PointsInPolygon.py
@@ -66,12 +66,14 @@ class PointsInPolygon(GeoAlgorithm):
         fieldName = self.getParameterValue(self.FIELD)
 
         polyProvider = polyLayer.dataProvider()
+        fields = polyProvider.fields()
+        fields.append(QgsField(fieldName, QVariant.Int))        
 
         (idxCount, fieldList) = vector.findOrCreateField(polyLayer,
                 polyLayer.pendingFields(), fieldName)
 
         writer = self.getOutputFromName(
-                self.OUTPUT).getVectorWriter(fieldList.toList(),
+                self.OUTPUT).getVectorWriter(fields.toList(),
                                              polyProvider.geometryType(),
                                              polyProvider.crs())
 
diff --git a/python/plugins/processing/algs/qgis/PointsInPolygonUnique.py b/python/plugins/processing/algs/qgis/PointsInPolygonUnique.py
index 5c910e20c21..ab654acdb4c 100644
--- a/python/plugins/processing/algs/qgis/PointsInPolygonUnique.py
+++ b/python/plugins/processing/algs/qgis/PointsInPolygonUnique.py
@@ -70,13 +70,15 @@ class PointsInPolygonUnique(GeoAlgorithm):
         classFieldName = self.getParameterValue(self.CLASSFIELD)
 
         polyProvider = polyLayer.dataProvider()
+        fields = polyProvider.fields()
+        fields.append(QgsField(fieldName, QVariant.Int))        
 
         classFieldIndex = pointLayer.fieldNameIndex(classFieldName)
         (idxCount, fieldList) = vector.findOrCreateField(polyLayer,
                 polyLayer.pendingFields(), fieldName)
 
         writer = self.getOutputFromName(
-                self.OUTPUT).getVectorWriter(fieldList.toList(),
+                self.OUTPUT).getVectorWriter(fields.toList(),
                                              polyProvider.geometryType(),
                                              polyProvider.crs())
 
diff --git a/python/plugins/processing/algs/qgis/PointsInPolygonWeighted.py b/python/plugins/processing/algs/qgis/PointsInPolygonWeighted.py
index 4e814d6111b..6de7a6a977f 100644
--- a/python/plugins/processing/algs/qgis/PointsInPolygonWeighted.py
+++ b/python/plugins/processing/algs/qgis/PointsInPolygonWeighted.py
@@ -73,12 +73,14 @@ class PointsInPolygonWeighted(GeoAlgorithm):
                 self.getParameterValue(self.WEIGHT))
 
         polyProvider = polyLayer.dataProvider()
+        fields = polyProvider.fields()
+        fields.append(QgsField(fieldName, QVariant.Int))        
 
         (idxCount, fieldList) = vector.findOrCreateField(polyLayer,
                 polyLayer.pendingFields(), fieldName)
 
         writer = self.getOutputFromName(
-                self.OUTPUT).getVectorWriter(fieldList.toList(),
+                self.OUTPUT).getVectorWriter(fields.toList(),
                                              polyProvider.geometryType(),
                                              polyProvider.crs())