Index: trunk/psastro/src/psastroMosaicFPtoTP.c
===================================================================
--- trunk/psastro/src/psastroMosaicFPtoTP.c	(revision 26259)
+++ trunk/psastro/src/psastroMosaicFPtoTP.c	(revision 41895)
@@ -80,5 +80,5 @@
 
     // linear fit without xy cross term
-    psPlaneTransform *map = psPlaneTransformAlloc (1, 1);
+    psPlaneTransform *map = psPlaneTransformAlloc (1, 1, PS_POLYNOMIAL_ORD);
     map->x->coeffMask[1][1] = PS_POLY_MASK_SET;
     map->y->coeffMask[1][1] = PS_POLY_MASK_SET;