diff --git a/rest_framework/routers.py b/rest_framework/routers.py
index 657ad67bc..0e8af7563 100644
--- a/rest_framework/routers.py
+++ b/rest_framework/routers.py
@@ -219,7 +219,7 @@ class SimpleRouter(BaseRouter):
         # consume `.json` style suffixes and should break at '/' boundaries.
         lookup_field = getattr(viewset, 'lookup_field', 'pk')
         lookup_url_kwarg = getattr(viewset, 'lookup_url_kwarg', None) or lookup_field
-        lookup_value = getattr(viewset, 'lookup_value_regex', '[^/.]+')
+        lookup_value = getattr(viewset, 'lookup_value_regex', '[^/]+')
         return base_regex.format(
             lookup_prefix=lookup_prefix,
             lookup_url_kwarg=lookup_url_kwarg,