diff --git a/include/wx/stream.h b/include/wx/stream.h
index 8ee9d1b8df..9acfab2133 100644
--- a/include/wx/stream.h
+++ b/include/wx/stream.h
@@ -13,7 +13,7 @@
 #define __WXSTREAM_H__
 
 #ifdef __GNUG__
-#pragma interface
+#pragma interface "stream.h"
 #endif
 
 #include <stdio.h>
diff --git a/src/common/datstrm.cpp b/src/common/datstrm.cpp
index 15a5ef78a8..3f456cca7c 100644
--- a/src/common/datstrm.cpp
+++ b/src/common/datstrm.cpp
@@ -134,6 +134,10 @@ wxDataOutputStream::wxDataOutputStream(wxOutputStream& s)
 {
 }
 
+wxDataOutputStream::~wxDataOutputStream()
+{
+}
+
 void wxDataOutputStream::Write32(unsigned long i)
 {
   char buf[4];
diff --git a/src/common/stream.cpp b/src/common/stream.cpp
index 430ffde227..2d9b313bb9 100644
--- a/src/common/stream.cpp
+++ b/src/common/stream.cpp
@@ -32,6 +32,7 @@ IMPLEMENT_ABSTRACT_CLASS(wxInputStream, wxObject)
 IMPLEMENT_ABSTRACT_CLASS(wxOutputStream, wxObject)
 IMPLEMENT_ABSTRACT_CLASS2(wxStream, wxInputStream, wxOutputStream)
 IMPLEMENT_CLASS(wxFilterInputStream, wxInputStream)
+IMPLEMENT_CLASS(wxFilterOutputStream, wxOutputStream)
 #endif
 
 wxInputStream::wxInputStream()