diff --git a/netbox/extras/forms/model_forms.py b/netbox/extras/forms/model_forms.py
index 040882d27..1286a9928 100644
--- a/netbox/extras/forms/model_forms.py
+++ b/netbox/extras/forms/model_forms.py
@@ -2,6 +2,7 @@ import json
 
 from django import forms
 from django.contrib.contenttypes.models import ContentType
+from django.http import QueryDict
 from django.utils.translation import gettext as _
 
 from dcim.models import DeviceRole, DeviceType, Location, Platform, Region, Site, SiteGroup
@@ -132,7 +133,7 @@ class SavedFilterForm(BootstrapMixin, forms.ModelForm):
         # Convert any parameters delivered via initial data to JSON data
         if initial and 'parameters' in initial:
             if type(initial['parameters']) is str:
-                initial['parameters'] = json.loads(initial['parameters'])
+                initial['parameters'] = dict(QueryDict(initial['parameters']).lists())
 
         super().__init__(*args, initial=initial, **kwargs)