diff --git a/djangorestframework/templatetags/add_query_param.py b/djangorestframework/templatetags/add_query_param.py
index 4cf0133be..143d7b3f1 100644
--- a/djangorestframework/templatetags/add_query_param.py
+++ b/djangorestframework/templatetags/add_query_param.py
@@ -4,7 +4,7 @@ register = Library()
 
 
 def add_query_param(url, param):
-    return unicode(URLObject(url).with_query(param))
+    return unicode(URLObject(url).add_query_param(*param.split('=')))
 
 
-register.filter('add_query_param', add_query_param)
+register.filter('add_query_param', add_query_param)
\ No newline at end of file