Index: trunk/ppStack/src/ppStackConvolve.c
===================================================================
--- trunk/ppStack/src/ppStackConvolve.c	(revision 27004)
+++ trunk/ppStack/src/ppStackConvolve.c	(revision 27036)
@@ -204,4 +204,17 @@
         psListAdd(fpaList, PS_LIST_TAIL, inCell->parent->parent);
 
+        // Correct ZP
+        if (options->matchZPs) {
+            // I think I need to take off the exposure time because we're going to set the new exposure time
+            psMetadataItem *zpItem = psMetadataLookup(inCell->parent->parent->concepts, "FPA.ZP");
+            zpItem->data.F32 += options->norm->data.F32[i] + 2.5*log10(options->sumExposure);
+
+            psMetadataItem *expItem = psMetadataLookup(inCell->parent->parent->concepts, "FPA.EXPOSURE");
+            expItem->data.F32 = options->sumExposure;
+
+            expItem = psMetadataLookup(inCell->concepts, "CELL.EXPOSURE");
+            expItem->data.F32 = options->sumExposure;
+        }
+
         options->cells->data[i] = psMemIncrRefCounter(inCell);
         if (!ppStackFilesIterateUp(config)) {