Index: trunk/pstamp/src/ppstampMakeStamp.c
===================================================================
--- trunk/pstamp/src/ppstampMakeStamp.c	(revision 21243)
+++ trunk/pstamp/src/ppstampMakeStamp.c	(revision 21403)
@@ -333,7 +333,7 @@
             }
         }
-        if (readout->weight) {
-            outReadout->weight = extractStamp(readout->weight, extractRegion,  0);
-            if (!outReadout->weight) {
+        if (readout->variance) {
+            outReadout->variance = extractStamp(readout->variance, extractRegion,  0);
+            if (!outReadout->variance) {
                 psError(PS_ERR_UNKNOWN, false, "failed to create postage stamp weight image\n");
                 status = false;