diff --git a/stream/servers/outfile_stream.hpp b/stream/servers/outfile_stream.hpp
index 37504d78c3..2946ff853a 100644
--- a/stream/servers/outfile_stream.hpp
+++ b/stream/servers/outfile_stream.hpp
@@ -1,5 +1,5 @@
-#ifndef MANGLE_STREAM_FILESERVER_H
-#define MANGLE_STREAM_FILESERVER_H
+#ifndef MANGLE_OSTREAM_FILESERVER_H
+#define MANGLE_OSTREAM_FILESERVER_H
 
 #include "std_ostream.hpp"
 #include <fstream>
diff --git a/stream/servers/std_ostream.hpp b/stream/servers/std_ostream.hpp
index 9ec6609e96..f655477ff2 100644
--- a/stream/servers/std_ostream.hpp
+++ b/stream/servers/std_ostream.hpp
@@ -1,5 +1,5 @@
-#ifndef MANGLE_STREAM_STDIOSERVER_H
-#define MANGLE_STREAM_STDIOSERVER_H
+#ifndef MANGLE_OSTREAM_STDIOSERVER_H
+#define MANGLE_OSTREAM_STDIOSERVER_H
 
 #include "../stream.hpp"
 #include <iostream>