diff --git a/src/google/protobuf/io/gzip_stream.h b/src/google/protobuf/io/gzip_stream.h
index 15b02fe3d..df1a446eb 100644
--- a/src/google/protobuf/io/gzip_stream.h
+++ b/src/google/protobuf/io/gzip_stream.h
@@ -118,7 +118,7 @@ class LIBPROTOBUF_EXPORT GzipOutputStream : public ZeroCopyOutputStream {
     ZLIB = 2,
   };
 
-  struct Options {
+  struct LIBPROTOBUF_EXPORT Options {
     // Defaults to GZIP.
     Format format;