Index: APPS/common/Print/impl/ZPLPrinter.cls.xml
===================================================================
diff -u -r59691 -r59695
--- APPS/common/Print/impl/ZPLPrinter.cls.xml	(.../ZPLPrinter.cls.xml)	(revision 59691)
+++ APPS/common/Print/impl/ZPLPrinter.cls.xml	(.../ZPLPrinter.cls.xml)	(revision 59695)
@@ -20,7 +20,7 @@
 <ReturnType>%Status</ReturnType>
 <ServerOnly>1</ServerOnly>
 <Implementation><![CDATA[
-	Set ..DeviceString = DeviceString
+	Set ..DeviceString = "|PRN|"_DeviceString
 	Set ..ZPLLabels = ##class(%ListOfDataTypes).%New()
 	Quit $$$OK
 ]]></Implementation>