Index: trunk/psphot/src/psphotApplyPSF.c
===================================================================
--- trunk/psphot/src/psphotApplyPSF.c	(revision 4949)
+++ trunk/psphot/src/psphotApplyPSF.c	(revision 4954)
@@ -66,7 +66,7 @@
 
 	// fit PSF model (set/unset the pixel mask)
-	psImageKeepCircle (source->mask, x, y, model->radius, "or", PSPHOT_MASK_KEEP);
+	psImageKeepCircle (source->mask, x, y, model->radius, "OR", PSPHOT_MASK_MARKED);
 	status = pmSourceFitModel (source, model, true);
-	psImageKeepCircle (source->mask, x, y, model->radius, "and", ~PSPHOT_MASK_KEEP);
+	psImageKeepCircle (source->mask, x, y, model->radius, "AND", ~PSPHOT_MASK_MARKED);
 	if (!status || (model->params->data.F32[1] < 0)) {
 	  psLogMsg ("psphot", 3, "PSF fit failed for %f, %f (%d iterations)\n", x, y, model->nIter);