Index: trunk/pswarp/src/pswarpLoop.c
===================================================================
--- trunk/pswarp/src/pswarpLoop.c	(revision 21178)
+++ trunk/pswarp/src/pswarpLoop.c	(revision 21183)
@@ -67,5 +67,5 @@
 
     // output mask bits
-    psMaskType maskValue = psMetadataLookupU8(&status, recipe, "MASK.OUTPUT");
+    psImageMaskType maskValue = psMetadataLookupImageMask(&status, recipe, "MASK.OUTPUT");
     psAssert (status, "MASK.OUTPUT was not defined");