diff --git a/src/google/protobuf/io/gzip_stream.h b/src/google/protobuf/io/gzip_stream.h
index 3b5952e..32f4dfa 100644
--- a/src/google/protobuf/io/gzip_stream.h
+++ b/src/google/protobuf/io/gzip_stream.h
@@ -26,6 +26,9 @@
 // Must be included last.
 #include "google/protobuf/port_def.inc"
 
+#undef PROTOBUF_EXPORT
+#define PROTOBUF_EXPORT
+
 namespace google {
 namespace protobuf {
 namespace internal {