Index: trunk/psphot/src/psphotMakeGrowthCurve.c
===================================================================
--- trunk/psphot/src/psphotMakeGrowthCurve.c	(revision 20453)
+++ trunk/psphot/src/psphotMakeGrowthCurve.c	(revision 21183)
@@ -11,9 +11,9 @@
 
     // bit-masks to test for good/bad pixels
-    psMaskType maskVal = psMetadataLookupU8(&status, recipe, "MASK.PSPHOT");
+    psImageMaskType maskVal = psMetadataLookupImageMask(&status, recipe, "MASK.PSPHOT");
     assert (maskVal);
 
     // bit-mask to mark pixels not used in analysis
-    psMaskType markVal = psMetadataLookupU8(&status, recipe, "MARK.PSPHOT");
+    psImageMaskType markVal = psMetadataLookupImageMask(&status, recipe, "MARK.PSPHOT");
     assert (markVal);