diff --git a/Foundation/include/Poco/DeflatingStream.h b/Foundation/include/Poco/DeflatingStream.h
index b656163c0..4502652fd 100644
--- a/Foundation/include/Poco/DeflatingStream.h
+++ b/Foundation/include/Poco/DeflatingStream.h
@@ -176,7 +176,7 @@ protected:
 };
 
 
-class Foundation_API DeflatingInputStream: public DeflatingIOS, public std::istream
+class Foundation_API DeflatingInputStream: public std::istream, public DeflatingIOS
 	/// This stream compresses all data passing through it
 	/// using zlib's deflate algorithm.
 {
diff --git a/Foundation/include/Poco/InflatingStream.h b/Foundation/include/Poco/InflatingStream.h
index 66a42b1bc..7f34650cc 100644
--- a/Foundation/include/Poco/InflatingStream.h
+++ b/Foundation/include/Poco/InflatingStream.h
@@ -173,7 +173,7 @@ public:
 };
 
 
-class Foundation_API InflatingInputStream: public InflatingIOS, public std::istream
+class Foundation_API InflatingInputStream: public std::istream, public InflatingIOS
 	/// This stream decompresses all data passing through it
 	/// using zlib's inflate algorithm.
 	/// Example:
diff --git a/Foundation/src/DeflatingStream.cpp b/Foundation/src/DeflatingStream.cpp
index 56d7b9146..e68b7ea1e 100644
--- a/Foundation/src/DeflatingStream.cpp
+++ b/Foundation/src/DeflatingStream.cpp
@@ -334,15 +334,15 @@ DeflatingStreamBuf* DeflatingIOS::rdbuf()
 
 
 DeflatingOutputStream::DeflatingOutputStream(std::ostream& ostr, DeflatingStreamBuf::StreamType type, int level):
-	DeflatingIOS(ostr, type, level),
-	std::ostream(&_buf)
+	std::ostream(&_buf),
+	DeflatingIOS(ostr, type, level)
 {
 }
 
 
 DeflatingOutputStream::DeflatingOutputStream(std::ostream& ostr, int windowBits, int level):
-	DeflatingIOS(ostr, windowBits, level),
-	std::ostream(&_buf)
+	std::ostream(&_buf),
+	DeflatingIOS(ostr, windowBits, level)
 {
 }
 
@@ -365,15 +365,15 @@ int DeflatingOutputStream::sync()
 
 
 DeflatingInputStream::DeflatingInputStream(std::istream& istr, DeflatingStreamBuf::StreamType type, int level):
-	DeflatingIOS(istr, type, level),
-	std::istream(&_buf)
+	std::istream(&_buf),
+	DeflatingIOS(istr, type, level)
 {
 }
 
 
 DeflatingInputStream::DeflatingInputStream(std::istream& istr, int windowBits, int level):
-	DeflatingIOS(istr, windowBits, level),
-	std::istream(&_buf)
+	std::istream(&_buf),
+	DeflatingIOS(istr, windowBits, level)
 {
 }
 
diff --git a/Foundation/src/InflatingStream.cpp b/Foundation/src/InflatingStream.cpp
index 1eac3fa1a..274c3b79c 100644
--- a/Foundation/src/InflatingStream.cpp
+++ b/Foundation/src/InflatingStream.cpp
@@ -309,15 +309,15 @@ InflatingStreamBuf* InflatingIOS::rdbuf()
 
 
 InflatingOutputStream::InflatingOutputStream(std::ostream& ostr, InflatingStreamBuf::StreamType type):
-	InflatingIOS(ostr, type),
-	std::ostream(&_buf)
+	std::ostream(&_buf),
+	InflatingIOS(ostr, type)
 {
 }
 
 
 InflatingOutputStream::InflatingOutputStream(std::ostream& ostr, int windowBits):
-	InflatingIOS(ostr, windowBits),
-	std::ostream(&_buf)
+	std::ostream(&_buf),
+	InflatingIOS(ostr, windowBits)
 {
 }
 
@@ -334,15 +334,15 @@ int InflatingOutputStream::close()
 
 
 InflatingInputStream::InflatingInputStream(std::istream& istr, InflatingStreamBuf::StreamType type):
-	InflatingIOS(istr, type),
-	std::istream(&_buf)
+	std::istream(&_buf),
+	InflatingIOS(istr, type)
 {
 }
 
 
 InflatingInputStream::InflatingInputStream(std::istream& istr, int windowBits):
-	InflatingIOS(istr, windowBits),
-	std::istream(&_buf)
+	std::istream(&_buf),
+	InflatingIOS(istr, windowBits)
 {
 }