Index: trunk/psModules/src/detrend/pmMaskBadPixels.c
===================================================================
--- trunk/psModules/src/detrend/pmMaskBadPixels.c	(revision 13591)
+++ trunk/psModules/src/detrend/pmMaskBadPixels.c	(revision 14935)
@@ -112,5 +112,5 @@
     psStats *stats = psStatsAlloc(PS_STAT_ROBUST_MEDIAN | PS_STAT_ROBUST_STDEV);
     stats->nSubsample = frac * image->numCols * image->numRows;
-    if (!psImageBackground(stats, image, mask, maskVal, rng) ||
+    if (!psImageBackground(stats, NULL, image, mask, maskVal, rng) ||
             !isfinite(stats->robustMedian) || !isfinite(stats->robustUQ) || !isfinite(stats->robustLQ)) {
         psError(PS_ERR_UNKNOWN, false, "Unable to measure image statistics.\n");