Index: trunk/psModules/src/imcombine/pmStackReject.c
===================================================================
--- trunk/psModules/src/imcombine/pmStackReject.c	(revision 20568)
+++ trunk/psModules/src/imcombine/pmStackReject.c	(revision 20571)
@@ -168,5 +168,5 @@
         psRegion *region = subRegions->data[i]; // Region of interest
         pmSubtractionKernels *kernels = subKernels->data[i]; // Kernel of interest
-        if (!pmSubtractionConvolve(convRO, NULL, inRO, NULL, NULL, stride, 0, 0, 1.0, NAN,
+        if (!pmSubtractionConvolve(convRO, NULL, inRO, NULL, NULL, stride, 0, 0, 1.0, 0.0,
                                    region, kernels, false, true)) {
             psError(PS_ERR_UNKNOWN, false, "Unable to convolve mask image in region %d.", i);