diff --git a/python/plugins/processing/algs/gdal/AssignProjection.py b/python/plugins/processing/algs/gdal/AssignProjection.py
index bddd83decca..bf7c9945159 100644
--- a/python/plugins/processing/algs/gdal/AssignProjection.py
+++ b/python/plugins/processing/algs/gdal/AssignProjection.py
@@ -29,10 +29,10 @@ import os
 
 from qgis.PyQt.QtGui import QIcon
 
+from qgis.core import (QgsProcessingParameterRasterLayer,
+                       QgsProcessingParameterCrs,
+                       QgsProcessingOutputRasterLayer)
 from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
-from processing.core.parameters import ParameterRaster
-from processing.core.parameters import ParameterCrs
-from processing.core.outputs import OutputRaster
 from processing.algs.gdal.GdalUtils import GdalUtils
 
 from processing.tools.system import isWindows
@@ -50,11 +50,11 @@ class AssignProjection(GdalAlgorithm):
         super().__init__()
 
     def initAlgorithm(self, config=None):
-        self.addParameter(ParameterRaster(self.INPUT, self.tr('Input layer'), False))
-        self.addParameter(ParameterCrs(self.CRS,
-                                       self.tr('Desired CRS'), ''))
+        self.addParameter(QgsProcessingParameterRasterLayer(self.INPUT, self.tr('Input layer'), optional=False))
+        self.addParameter(QgsProcessingParameterCrs(self.CRS,
+                                       self.tr('Desired CRS')))
 
-        self.addOutput(OutputRaster(self.OUTPUT, self.tr('Layer with projection'), True))
+        self.addOutput(QgsProcessingOutputRasterLayer(self.OUTPUT, self.tr('Layer with projection')))
 
     def name(self):
         return 'assignprojection'
@@ -69,9 +69,10 @@ class AssignProjection(GdalAlgorithm):
         return self.tr('Raster projections')
 
     def getConsoleCommands(self, parameters, context, feedback):
-        fileName = self.getParameterValue(self.INPUT)
-        crs = self.getParameterValue(self.CRS)
-        output = self.getOutputValue(self.OUTPUT)  # NOQA
+        inLayer = self.parameterAsRasterLayer(parameters, self.INPUT, context)
+        fileName = inLayer.source()
+
+        crs = self.parameterAsCrs(parameters, self.CRS, context).authid()
 
         arguments = []
         arguments.append('-a_srs')
diff --git a/python/plugins/processing/algs/gdal/GdalAlgorithm.py b/python/plugins/processing/algs/gdal/GdalAlgorithm.py
index e09470fccad..32817afe934 100644
--- a/python/plugins/processing/algs/gdal/GdalAlgorithm.py
+++ b/python/plugins/processing/algs/gdal/GdalAlgorithm.py
@@ -45,6 +45,7 @@ class GdalAlgorithm(QgsProcessingAlgorithm):
 
     def __init__(self):
         super().__init__()
+        self.output_values = {}
 
     def icon(self):
         return QgsApplication.getThemeIcon("/providerGdal.svg")
@@ -89,6 +90,9 @@ class GdalAlgorithm(QgsProcessingAlgorithm):
             ogr_layer_name = GdalUtils.ogrLayerName(input_layer.dataProvider().dataSourceUri())
         return ogr_data_path, ogr_layer_name
 
+    def setOutputValue(self, name, value):
+        self.output_values[name] = value
+
     def processAlgorithm(self, parameters, context, feedback):
         commands = self.getConsoleCommands(parameters, context, feedback)
         GdalUtils.runGdal(commands, feedback)
@@ -96,7 +100,11 @@ class GdalAlgorithm(QgsProcessingAlgorithm):
         # auto generate outputs
         results = {}
         for o in self.outputDefinitions():
-            results[o.name()] = parameters[o.name()]
+            if o.name() in parameters:
+                results[o.name()] = parameters[o.name()]
+        for k, v in self.output_values.items():
+            results[k]=v
+
         return results
 
     def helpUrl(self):
diff --git a/python/plugins/processing/algs/gdal/GdalAlgorithmProvider.py b/python/plugins/processing/algs/gdal/GdalAlgorithmProvider.py
index e7fd1380657..a90cb77bee2 100644
--- a/python/plugins/processing/algs/gdal/GdalAlgorithmProvider.py
+++ b/python/plugins/processing/algs/gdal/GdalAlgorithmProvider.py
@@ -33,6 +33,7 @@ from qgis.core import (QgsApplication,
 from processing.core.ProcessingConfig import ProcessingConfig, Setting
 from .GdalUtils import GdalUtils
 
+from .AssignProjection import AssignProjection
 from .aspect import aspect
 from .warp import warp
 # from .nearblack import nearblack
@@ -69,8 +70,7 @@ from .warp import warp
 # from .rasterize_over import rasterize_over
 # from .retile import retile
 # from .gdal2tiles import gdal2tiles
-# from .AssignProjection import AssignProjection
-#
+
 from .ogr2ogrpointsonlines import Ogr2OgrPointsOnLines
 from .ogr2ogrtopostgis import Ogr2OgrToPostGis
 
@@ -143,6 +143,7 @@ class GdalAlgorithmProvider(QgsProcessingProvider):
         self.algs = [
             # nearblack(),
             # information(),
+            AssignProjection(),
             aspect(),
             warp(),
             # translate(),
@@ -176,7 +177,6 @@ class GdalAlgorithmProvider(QgsProcessingProvider):
             # rasterize_over(),
             # retile(),
             # gdal2tiles(),
-            # AssignProjection(),
             # ----- OGR tools -----
             Ogr2OgrPointsOnLines(),
             Ogr2OgrToPostGis(),