diff --git a/Foundation/include/Poco/DeflatingStream.h b/Foundation/include/Poco/DeflatingStream.h
index 2def954d3..b656163c0 100644
--- a/Foundation/include/Poco/DeflatingStream.h
+++ b/Foundation/include/Poco/DeflatingStream.h
@@ -139,7 +139,7 @@ protected:
 };
 
 
-class Foundation_API DeflatingOutputStream: public DeflatingIOS, public std::ostream
+class Foundation_API DeflatingOutputStream: public std::ostream, public DeflatingIOS
 	/// This stream compresses all data passing through it
 	/// using zlib's deflate algorithm.
 	/// After all data has been written to the stream, close()
diff --git a/Foundation/include/Poco/InflatingStream.h b/Foundation/include/Poco/InflatingStream.h
index ca20cb07e..66a42b1bc 100644
--- a/Foundation/include/Poco/InflatingStream.h
+++ b/Foundation/include/Poco/InflatingStream.h
@@ -143,7 +143,7 @@ protected:
 };
 
 
-class Foundation_API InflatingOutputStream: public InflatingIOS, public std::ostream
+class Foundation_API InflatingOutputStream: public std::ostream, public InflatingIOS
 	/// This stream decompresses all data passing through it
 	/// using zlib's inflate algorithm.
 	///