Index: trunk/psModules/src/imcombine/pmPSFEnvelope.c
===================================================================
--- trunk/psModules/src/imcombine/pmPSFEnvelope.c	(revision 20999)
+++ trunk/psModules/src/imcombine/pmPSFEnvelope.c	(revision 21183)
@@ -223,5 +223,5 @@
     // *** readout->weight = (psImage*)psBinaryOp(NULL, readout->image, "*", psScalarAlloc(WEIGHT_FACTOR, PS_TYPE_F32));
     readout->weight = (psImage*)psBinaryOp(NULL, readout->image, "+", psScalarAlloc(WEIGHT_VAL, PS_TYPE_F32));
-    readout->mask = psImageAlloc(numCols, numRows, PS_TYPE_MASK);
+    readout->mask = psImageAlloc(numCols, numRows, PS_TYPE_IMAGE_MASK);
     psImageInit(readout->mask, 0);