diff --git a/python/plugins/processing/algs/r/RAlgorithm.py b/python/plugins/processing/algs/r/RAlgorithm.py
index ed9cc86fe0f..bbde107531c 100644
--- a/python/plugins/processing/algs/r/RAlgorithm.py
+++ b/python/plugins/processing/algs/r/RAlgorithm.py
@@ -26,6 +26,7 @@ __copyright__ = '(C) 2012, Victor Olaya'
 __revision__ = '$Format:%H$'
 
 import os
+import json
 
 from qgis.PyQt.QtGui import QIcon
 
@@ -461,7 +462,7 @@ class RAlgorithm(GeoAlgorithm):
                         if param.name in descriptions:
                             descs[param.name] = unicode(descriptions[param.name])
                 except:
-                    return None
+                    return descs
         return descs
 
     def checkBeforeOpeningParametersDialog(self):
diff --git a/python/plugins/processing/script/ScriptAlgorithm.py b/python/plugins/processing/script/ScriptAlgorithm.py
index 9030f91f993..aa6b9409560 100644
--- a/python/plugins/processing/script/ScriptAlgorithm.py
+++ b/python/plugins/processing/script/ScriptAlgorithm.py
@@ -27,6 +27,7 @@ __revision__ = '$Format:%H$'
 
 import os
 import re
+import json
 from qgis.core import QgsExpressionContextUtils, QgsExpressionContext
 from qgis.PyQt.QtGui import QIcon
 from processing.core.GeoAlgorithm import GeoAlgorithm
@@ -378,5 +379,5 @@ class ScriptAlgorithm(GeoAlgorithm):
                         if param.name in descriptions:
                             descs[param.name] = unicode(descriptions[param.name])
                 except:
-                    return None
+                    return descs
         return descs