Index: trunk/psastro/src/psastroChipAstrom.c
===================================================================
--- trunk/psastro/src/psastroChipAstrom.c	(revision 10438)
+++ trunk/psastro/src/psastroChipAstrom.c	(revision 10513)
@@ -55,5 +55,5 @@
 		    return false;
 		}
-		pmAstromWriteWCS (chip->toFPA, fpa->toSky, updates, plateScale);
+		pmAstromWriteWCS (chip->toFPA, fpa->toTangentPlane, fpa->toSky, updates, plateScale);
 		psMetadataAdd (readout->analysis, PS_LIST_TAIL, "PSASTRO.HEADER",  PS_DATA_METADATA, "psastro header stats", updates);
 		psFree (updates);