diff --git a/src/add-ons/print/shared/Jamfile b/src/add-ons/print/shared/Jamfile
index 5ee8a5ff6e..0aa52b2999 100644
--- a/src/add-ons/print/shared/Jamfile
+++ b/src/add-ons/print/shared/Jamfile
@@ -21,4 +21,5 @@ StaticLibrary
 #	printerdriveraddon
 #	:
 #	PrinterDriverAddOn.cpp
-#	;
\ No newline at end of file
+#	;
+
diff --git a/src/add-ons/print/shared/PrintTransportAddOn.cpp b/src/add-ons/print/shared/PrintTransportAddOn.cpp
index 3bb4a3c9cf..f1156b553a 100644
--- a/src/add-ons/print/shared/PrintTransportAddOn.cpp
+++ b/src/add-ons/print/shared/PrintTransportAddOn.cpp
@@ -1,24 +1,32 @@
 #include "PrintTransportAddOn.h"
 
+// We don't support multiple instances of the same transport add-on
 static BDataIO* gTransport = NULL;
 
-extern "C" _EXPORT BDataIO *init_transport(BMessage *msg) {
-	if (msg != NULL && gTransport == NULL) {
-		const char* printer_name = msg->FindString("printer_name");
-		if (printer_name && *printer_name != '\0') {
-			BDirectory printer(printer_name);
-			if (printer.InitCheck() == B_OK) {
-				gTransport = instanciate_transport(&printer, msg);
-				return gTransport;
-			}
-		}
-	}
+extern "C" _EXPORT BDataIO *init_transport(BMessage *msg)
+{
+	if (msg == NULL || gTransport != NULL)
+		return NULL;
+		
+	const char *spool_path = msg->FindString("printer_file");
+
+	if (spool_path && *spool_path != '\0') {
+		BDirectory printer(spool_path);
+
+		if (printer.InitCheck() == B_OK) {
+			gTransport = instanciate_transport(&printer, msg);
+			return gTransport;
+		};
+	};
+	
 	return NULL;
 }
 
-extern "C" _EXPORT void exit_transport() {
+extern "C" _EXPORT void exit_transport()
+{
 	if (gTransport) {
-		delete gTransport; gTransport = NULL;	
+		delete gTransport;
+		gTransport = NULL;	
 	}
 }