diff --git a/python/plugins/processing/algs/qgis/Polygonize.py b/python/plugins/processing/algs/qgis/Polygonize.py
index ba78b032824..162efe69017 100644
--- a/python/plugins/processing/algs/qgis/Polygonize.py
+++ b/python/plugins/processing/algs/qgis/Polygonize.py
@@ -55,7 +55,7 @@ class Polygonize(GeoAlgorithm):
                                            self.tr('Keep table structure of line layer'), False))
         self.addParameter(ParameterBoolean(self.GEOMETRY,
                                            self.tr('Create geometry columns'), True))
-        self.addOutput(OutputVector(self.OUTPUT, self.tr('Polygons from lines'), datatype=[dataojects.TYPE_VECTOR_POLYGON]))
+        self.addOutput(OutputVector(self.OUTPUT, self.tr('Polygons from lines'), datatype=[dataobjects.TYPE_VECTOR_POLYGON]))
 
     def processAlgorithm(self, progress):
         vlayer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))