diff --git a/src/google/protobuf/port.h b/src/google/protobuf/port.h
index aa2cfc1eb8..4c09eb1dbe 100644
--- a/src/google/protobuf/port.h
+++ b/src/google/protobuf/port.h
@@ -37,11 +37,4 @@
 #define GOOGLE_PROTOBUF_PORT_H__
 
 
-#include <google/protobuf/stubs/port.h>
-
-// Protobuf intends to move into the pb:: namespace.
-namespace protobuf_future_namespace_placeholder {}
-namespace pb = ::protobuf_future_namespace_placeholder;
-
-
 #endif  // GOOGLE_PROTOBUF_PORT_H__