Index: trunk/ippconfig/recipes/ppStack.config
===================================================================
--- trunk/ippconfig/recipes/ppStack.config	(revision 34849)
+++ trunk/ippconfig/recipes/ppStack.config	(revision 34860)
@@ -32,4 +32,6 @@
 TARGET.FRAC	F32	0.1		# Minimum flux fraction for target PSF
 TARGET.MINMAG	F32	3.0		# Minimum magnitude difference to tolerate in stamp
+
+BACKGROUND.MODEL    BOOL   FALSE        # Construct a stacked version of the warp stage background
 
 RENORM		BOOL	TRUE		# Renormalise weight maps?