diff --git a/rest_framework/versioning.py b/rest_framework/versioning.py
index b9556baa0..6a4756f8c 100644
--- a/rest_framework/versioning.py
+++ b/rest_framework/versioning.py
@@ -184,8 +184,10 @@ class MultipleNamespaceVersioning(NamespaceVersioning):
         for namespace in resolver_match.namespaces:
             if namespace in self.allowed_versions:
                 version = namespace
+
         if version is None:
             version = self.default_version
+            
         return version
 
     def reverse(self, viewname, args=None, kwargs=None, request=None, format=None, **extra):
@@ -202,7 +204,6 @@ class MultipleNamespaceVersioning(NamespaceVersioning):
         return request.version + ':' + viewname
 
 
-
 class HostNameVersioning(BaseVersioning):
     """
     GET /something/ HTTP/1.1