Index: trunk/ppStack/src/ppStackArguments.c
===================================================================
--- trunk/ppStack/src/ppStackArguments.c	(revision 31158)
+++ trunk/ppStack/src/ppStackArguments.c	(revision 31422)
@@ -204,5 +204,5 @@
 	}
         psArgumentRemove (argNum, &argc, argv);
-	if (strcasecmp(argv[argNum], "NIGHTLY") && strcasecmp(argv[argNum], "DEEP") && strcasecmp(argv[argNum], "BEST_IQ")) {
+	if (strcasecmp(argv[argNum], "NIGHTLY_STACK") && strcasecmp(argv[argNum], "DEEP_STACK") && strcasecmp(argv[argNum], "IQ_STACK")) {
 	    psErrorStackPrint(stderr, "Invalid option for -stack-type %s (must be one of NIGHTLY_STACK, DEEP_STACK, IQ_STACK)", argv[argNum]);
 	    exit(PS_EXIT_CONFIG_ERROR);