diff --git a/sao/src/sao.js b/sao/src/sao.js
index b55f9cb97f..a46feb1aa4 100644
--- a/sao/src/sao.js
+++ b/sao/src/sao.js
@@ -529,8 +529,7 @@ var Sao = {
                 attributes.name = loads(params.name || '""');
                 attributes.search_value = loads(params.search_value || '[]');
                 attributes.domain = loads(params.domain || '[]');
-                attributes.context_domain = loads(
-                    params.context_domain || '[]');
+                attributes.context_domain = params.context_domain;
                 attributes.context = loads(params.context || '{}');
                 attributes.context_model = params.context_model;
                 attributes.tab_domain = loads(params.tab_domain || '[]');
diff --git a/sao/src/screen.js b/sao/src/screen.js
index d6f3bcfa19..5f0fada6d7 100644
--- a/sao/src/screen.js
+++ b/sao/src/screen.js
@@ -2170,7 +2170,7 @@
             }
             if (!jQuery.isEmptyObject(this.context_domain)) {
                 query_string.push(
-                    ['context_domain', dumps(this.context_domain)]);
+                    ['context_domain', this.context_domain]);
             }
             var context = this.local_context;  // Avoid rpc context
             if (!jQuery.isEmptyObject(context)) {
diff --git a/tryton/tryton/gui/main.py b/tryton/tryton/gui/main.py
index 47e52c47b6..978ee7aca8 100644
--- a/tryton/tryton/gui/main.py
+++ b/tryton/tryton/gui/main.py
@@ -1017,8 +1017,7 @@ class Main(Gtk.Application):
                 attributes['search_value'] = loads(
                     params.get('search_value', '[]'))
                 attributes['domain'] = loads(params.get('domain', '[]'))
-                attributes['context_domain'] = loads(
-                    params.get('context_domain', '[]'))
+                attributes['context_domain'] = params.get('context_domain')
                 attributes['context'] = loads(params.get('context', '{}'))
                 attributes['context_model'] = params.get('context_model')
                 attributes['tab_domain'] = loads(
diff --git a/tryton/tryton/gui/window/view_form/screen/screen.py b/tryton/tryton/gui/window/view_form/screen/screen.py
index af7e381ca8..109edf6be7 100644
--- a/tryton/tryton/gui/window/view_form/screen/screen.py
+++ b/tryton/tryton/gui/window/view_form/screen/screen.py
@@ -1363,9 +1363,7 @@ class Screen:
             query_string.append(('domain', json.dumps(
                         self.domain, cls=JSONEncoder, separators=(',', ':'))))
         if self.context_domain:
-            query_string.append(('context_domain', json.dumps(
-                        self.context_domain, cls=JSONEncoder,
-                        separators=(',', ':'))))
+            query_string.append(('context_domain', self.context_domain))
         context = self.local_context  # Avoid rpc context
         if context:
             query_string.append(('context', json.dumps(