diff --git a/src/add-ons/print/transports/lpr/LprTransport.cpp b/src/add-ons/print/transports/lpr/LprTransport.cpp
index 5302c31093..7f0b89aa29 100644
--- a/src/add-ons/print/transports/lpr/LprTransport.cpp
+++ b/src/add-ons/print/transports/lpr/LprTransport.cpp
@@ -21,6 +21,9 @@
 #include "DbgMsg.h"
 
 
+using namespace std;
+
+
 LprTransport::LprTransport(BMessage *msg)
 	:
 	BDataIO()
diff --git a/src/add-ons/print/transports/lpr/LprTransport.h b/src/add-ons/print/transports/lpr/LprTransport.h
index db2bcefb89..2841753b0f 100644
--- a/src/add-ons/print/transports/lpr/LprTransport.h
+++ b/src/add-ons/print/transports/lpr/LprTransport.h
@@ -10,6 +10,9 @@
 #include <string>
 
 
+using namespace std;
+
+
 class LprTransport : public BDataIO {
 public:
 					LprTransport(BMessage *msg);
diff --git a/src/add-ons/print/transports/lpr/LpsClient.cpp b/src/add-ons/print/transports/lpr/LpsClient.cpp
index 64c2ec4020..9576a0ecf7 100644
--- a/src/add-ons/print/transports/lpr/LpsClient.cpp
+++ b/src/add-ons/print/transports/lpr/LpsClient.cpp
@@ -13,6 +13,9 @@
 #include "Socket.h"
 
 
+using namespace std;
+
+
 #define LPS_SERVER_PORT		515
 #define LPS_CLIENT_PORT_S	721
 #define LPS_CLIENT_PORT_E	731
diff --git a/src/add-ons/print/transports/lpr/LpsClient.h b/src/add-ons/print/transports/lpr/LpsClient.h
index cc9cb8fbdd..3a790e1efd 100644
--- a/src/add-ons/print/transports/lpr/LpsClient.h
+++ b/src/add-ons/print/transports/lpr/LpsClient.h
@@ -8,6 +8,9 @@
 #include <string>
 
 
+using namespace std;
+
+
 class Socket;