diff --git a/fdstream.cpp b/fdstream.cpp
index a12b7b4..0b719a1 100644
--- a/fdstream.cpp
+++ b/fdstream.cpp
@@ -9,6 +9,8 @@
 #include "libscio.hpp"
 #include <unistd.h>
 
+// fdostream --------------------------------------------------------------
+
 sc::io::fdostream::~fdostream() {
 	close();
 }
@@ -20,6 +22,21 @@ void sc::io::fdostream::close() {
 	}
 }
 
+sc::io::fdostream::fdostream(sc::io::fdostream&& other) : std::ostream(&_outbuf) {
+	_outbuf.fd(other._outbuf.fd());
+	other._outbuf.fd(-1);
+}
+
+sc::io::fdostream& sc::io::fdostream::operator=(sc::io::fdostream&& other) {
+	if (this != &other) {
+		_outbuf.fd(other._outbuf.fd());
+		other._outbuf.fd(-1);
+	}
+	return *this;
+}
+
+// fdistream --------------------------------------------------------------
+
 sc::io::fdistream::~fdistream() {
 	close();
 }
@@ -31,6 +48,21 @@ void sc::io::fdistream::close() {
 	}
 }
 
+sc::io::fdistream::fdistream(sc::io::fdistream&& other) : std::istream(&_inbuf) {
+	_inbuf.fd(other._inbuf.fd());
+	other._inbuf.fd(-1);
+}
+
+sc::io::fdistream& sc::io::fdistream::operator=(sc::io::fdistream&& other) {
+	if (this != &other) {
+		_inbuf.fd(other._inbuf.fd());
+		other._inbuf.fd(-1);
+	}
+	return *this;
+}
+
+// fdstream ---------------------------------------------------------------
+
 sc::io::fdstream::~fdstream() {
 	close();
 }
@@ -41,3 +73,16 @@ void sc::io::fdstream::close() {
 		_iobuf.fd(-1);
 	}
 }
+
+sc::io::fdstream::fdstream(sc::io::fdstream&& other) : std::iostream(&_iobuf) {
+	_iobuf.fd(other._iobuf.fd());
+	other._iobuf.fd(-1);
+}
+
+sc::io::fdstream& sc::io::fdstream::operator=(sc::io::fdstream&& other) {
+	if (this != &other) {
+		_iobuf.fd(other._iobuf.fd());
+		other._iobuf.fd(-1);
+	}
+	return *this;
+}
diff --git a/libscio.hpp b/libscio.hpp
index 05ed456..8a98aa2 100644
--- a/libscio.hpp
+++ b/libscio.hpp
@@ -53,9 +53,18 @@ namespace sc {
 
 		class fdostream : public std::ostream {
 			public:
-				fdostream(int fd) : std::ostream(&_outbuf), _outbuf(fd) {}
 				fdostream() : std::ostream(&_outbuf), _outbuf(-1) {}
+				fdostream(int fd) : std::ostream(&_outbuf), _outbuf(fd) {}
 
+				// no copying
+				fdostream(const fdostream&) = delete;
+				fdostream& operator=(const fdostream&) = delete;
+
+				// moving allowed
+				fdostream(fdostream&& other);
+				fdostream& operator=(fdostream&& other);
+
+				// cleanup: fdostream is RAII class for open file descriptor
 				virtual ~fdostream();
 
 				int fd() const { return _outbuf.fd(); }
@@ -70,9 +79,18 @@ namespace sc {
 
 		class fdistream : public std::istream {
 			public:
-				fdistream(int fd) : std::istream(&_inbuf), _inbuf(fd) {}
 				fdistream() : std::istream(&_inbuf), _inbuf(-1) {}
+				fdistream(int fd) : std::istream(&_inbuf), _inbuf(fd) {}
 
+				// no copying
+				fdistream(const fdistream&) = delete;
+				fdistream& operator=(const fdistream&) = delete;
+
+				// moving allowed
+				fdistream(fdistream&& other);
+				fdistream& operator=(fdistream&& other);
+
+				// cleanup: fdistream is RAII class for open file descriptor
 				virtual ~fdistream();
 
 				int fd() const { return _inbuf.fd(); }
@@ -90,6 +108,15 @@ namespace sc {
 				fdstream() : std::iostream(&_iobuf) {}
 				fdstream(int fd) : std::iostream(&_iobuf), _iobuf(fd) {}
 
+				// no copying
+				fdstream(const fdstream&) = delete;
+				fdstream& operator=(const fdstream&) = delete;
+
+				// moving allowed
+				fdstream(fdstream&& other);
+				fdstream& operator=(fdstream&& other);
+
+				// cleanup: fdstream is RAII class for open file descriptor
 				virtual ~fdstream();
 
 				int fd() const { return _iobuf.fd(); }