Index: trunk/psModules/src/detrend/pmShutterCorrection.c
===================================================================
--- trunk/psModules/src/detrend/pmShutterCorrection.c	(revision 15162)
+++ trunk/psModules/src/detrend/pmShutterCorrection.c	(revision 15254)
@@ -230,6 +230,6 @@
 
     // mask out the terms we will not fit
-    line->mask[0][0] = 1;
-    line->mask[1][1] = 1;
+    line->coeffMask[0][0] = PS_POLY_MASK_SET;
+    line->coeffMask[1][1] = PS_POLY_MASK_SET;
     line->coeff[0][0] = 0;
     line->coeff[1][1] = 0;