diff --git a/python/plugins/processing/gui/wrappers.py b/python/plugins/processing/gui/wrappers.py
index bf33c6922328..5fd3861ac06f 100755
--- a/python/plugins/processing/gui/wrappers.py
+++ b/python/plugins/processing/gui/wrappers.py
@@ -1773,7 +1773,7 @@ class WidgetWrapperFactory:
     @staticmethod
     def create_wrapper(param, dialog, row=0, col=0):
 
-        if param.metadata().get('widget_wrapper', None) is not None:
+        if param.metadata().get('widget_wrapper', {}).get('class', None) is not None:
             return WidgetWrapperFactory.create_wrapper_from_metadata(param, dialog, row, col)
         else:
             # try from c++ registry first