diff --git a/libs/main/io_devices/piiostream.h b/libs/main/io_devices/piiostream.h
index e78bee0e..708ea88e 100644
--- a/libs/main/io_devices/piiostream.h
+++ b/libs/main/io_devices/piiostream.h
@@ -81,8 +81,8 @@ public:
 
 	//! \~english Contructs %PIIOTextStream for "string" string
 	//! \~russian Создает %PIIOTextStream для строки "string"
-	PIIOTextStream(PIString * string): PITextStream<PIIOBinaryStream>(&bin_stream) {
-		io_string = new PIIOString(string);
+	PIIOTextStream(PIString * string, PIIODevice::DeviceMode mode): PITextStream<PIIOBinaryStream>(&bin_stream) {
+		io_string = new PIIOString(string, mode);
 		bin_stream.setDevice(io_string);
 	}
 
diff --git a/libs/main/io_utils/piconnection.cpp b/libs/main/io_utils/piconnection.cpp
index 2707f8d0..a2ff6877 100644
--- a/libs/main/io_utils/piconnection.cpp
+++ b/libs/main/io_utils/piconnection.cpp
@@ -260,7 +260,7 @@ bool PIConnection::configure(PIConfig & conf, const PIString & name_) {
 
 PIString PIConnection::makeConfig() const {
 	PIString ret;
-	PIIOTextStream ts(&ret);
+	PIIOTextStream ts(&ret, PIIODevice::WriteOnly);
 	ts << "[" << name() << "]\n";
 	PIVector<PIIODevice *> devs(boundedDevices());
 	int dn(-1);