diff --git a/simgear/io/sg_socket.cxx b/simgear/io/sg_socket.cxx
index 70bb382c..b85205c2 100644
--- a/simgear/io/sg_socket.cxx
+++ b/simgear/io/sg_socket.cxx
@@ -28,7 +28,7 @@
 #include <strings.h>
 #endif
 
-#include <ostream>
+#include STL_IOSTREAM
 
 #include <simgear/debug/logstream.hxx>
 
diff --git a/simgear/xml/easyxml.cxx b/simgear/xml/easyxml.cxx
index 8fc5ca15..43054d16 100644
--- a/simgear/xml/easyxml.cxx
+++ b/simgear/xml/easyxml.cxx
@@ -2,13 +2,13 @@
 
 #include <simgear/compiler.h>
 
-#include <ostream>
 #include <string.h>		// strcmp()
 
 #include "easyxml.hxx"
 #include "xmlparse.h"
 
 #include STL_FSTREAM
+#include STL_IOSTREAM
 
 SG_USING_STD(ifstream);