Index: trunk/ppStack/src/ppStackMatch.c
===================================================================
--- trunk/ppStack/src/ppStackMatch.c	(revision 25256)
+++ trunk/ppStack/src/ppStackMatch.c	(revision 25313)
@@ -14,5 +14,5 @@
 #define FAKE_SIZE 1                     // Size of fake convolution kernel
 #define SOURCE_MASK (PM_SOURCE_MODE_FAIL | PM_SOURCE_MODE_DEFECT | PM_SOURCE_MODE_SATURATED | \
-                     PM_SOURCE_MODE_CR_LIMIT) // Mask to apply to input sources
+                     PM_SOURCE_MODE_CR_LIMIT | PM_SOURCE_MODE_EXT_LIMIT) // Mask to apply to input sources
 #define FAINT_SOURCE_FRAC 1.0e-4         // Set minimum flux to this fraction of faintest source flux
 #define COVAR_FRAC 0.01                 // Truncation fraction for covariance matrix
@@ -288,6 +288,6 @@
 
             if (!pmReadoutFakeFromSources(fake, readout->image->numCols, readout->image->numRows,
-                                          stampSources, NULL, NULL, options->psf, NAN, footprint + size,
-                                          false, true)) {
+                                          stampSources, SOURCE_MASK, NULL, NULL, options->psf,
+                                          NAN, footprint + size, false, true)) {
                 psError(PS_ERR_UNKNOWN, false, "Unable to generate fake image with target PSF.");
                 psFree(fake);