Index: trunk/ppSub/src/ppSubBackground.c
===================================================================
--- trunk/ppSub/src/ppSubBackground.c	(revision 20775)
+++ trunk/ppSub/src/ppSubBackground.c	(revision 21183)
@@ -30,8 +30,8 @@
 
     psString maskBadStr = psMetadataLookupStr(NULL, ppSubRecipe, "MASK.BAD"); // Name of bits to mask for bad
-    psMaskType maskBad = pmConfigMaskGet(maskBadStr, config); // Bits to mask for bad pixels
+    psImageMaskType maskBad = pmConfigMaskGet(maskBadStr, config); // Bits to mask for bad pixels
 
     // user-defined masks to test for good/bad pixels (build from recipe list if not yet set)
-    psMetadataAddU8(psphotRecipe, PS_LIST_TAIL, "MASK.PSPHOT", PS_META_REPLACE, "user-defined mask", maskBad);
+    psMetadataAddImageMask(psphotRecipe, PS_LIST_TAIL, "MASK.PSPHOT", PS_META_REPLACE, "user-defined mask", maskBad);
 
     psImage *image = ro->image, *mask = ro->mask; // Image and mask of interest
@@ -59,5 +59,5 @@
     for (int y = 0; y < numRows; y++) {
         for (int x = 0; x < numCols; x++) {
-            if (mask && mask->data.PS_TYPE_MASK_DATA[y][x] & maskBad) {
+            if (mask && mask->data.PS_TYPE_IMAGE_MASK_DATA[y][x] & maskBad) {
                 image->data.F32[y][x] = 0.0;
             } else {
@@ -65,5 +65,5 @@
                 if (!isfinite(value)) {
                     image->data.F32[y][x] = NAN;
-                    mask->data.PS_TYPE_MASK_DATA[y][x] |= maskBad;
+                    mask->data.PS_TYPE_IMAGE_MASK_DATA[y][x] |= maskBad;
                 } else {
                     image->data.F32[y][x] -= value;