diff --git a/rest_framework/filters.py b/rest_framework/filters.py
index 9105ab91d9..fc7882fe11 100644
--- a/rest_framework/filters.py
+++ b/rest_framework/filters.py
@@ -136,8 +136,13 @@ def get_search_terms(self, request):
         Search terms are set by a ?search=... query parameter,
         and may be comma and/or whitespace delimited.
         """
-        params = request.query_params.get(self.search_param, '')
-        return params.replace(',', ' ').split()
+        params = request.query_params.getlist(self.search_param, '')
+        if params == '':
+            return []
+        elif len(params) == 1:
+            return params[0].replace(',', ' ').split()
+        else:
+            return params
 
     def construct_search(self, field_name):
         if field_name.startswith('^'):