Index: service_lpd.cc
===================================================================
--- service_lpd.cc	(revision 23734)
+++ service_lpd.cc	(working copy)
@@ -628,7 +628,7 @@
     string mode;
     mode = parent->service_engine->config->Search(PRINTER_SELECTION, PRINTER_SELECTION_DEFAULT);
     if (mode == "ask") {
-        command.addArgument("-printdialog");
+        command.addArgument("-print-dialog");
         copies = 1; //Ignore existing copies information when print dialogue is being displayed
     } else {
         command.addArgument("-print-to-default");