Index: trunk/ppStack/src/ppStackPSF.c
===================================================================
--- trunk/ppStack/src/ppStackPSF.c	(revision 18918)
+++ trunk/ppStack/src/ppStackPSF.c	(revision 23192)
@@ -9,5 +9,6 @@
 #include "ppStack.h"
 
-pmPSF *ppStackPSF(const pmConfig *config, int numCols, int numRows, const psArray *psfs)
+pmPSF *ppStackPSF(const pmConfig *config, int numCols, int numRows,
+                  const psArray *psfs, const psVector *inputMask)
 {
     // Get the recipe values
@@ -19,4 +20,11 @@
     const char *psfModel = psMetadataLookupStr(NULL, recipe, "PSF.MODEL"); // Model for PSF
     int psfOrder = psMetadataLookupS32(NULL, recipe, "PSF.ORDER"); // Spatial order for PSF
+
+    for (int i = 0; i < psfs->n; i++) {
+        if (inputMask->data.U8[i]) {
+            psFree(psfs->data[i]);
+            psfs->data[i] = NULL;
+        }
+    }
 
     // Solve for the target PSF