Index: trunk/psastro/src/psastro.h
===================================================================
--- trunk/psastro/src/psastro.h	(revision 17786)
+++ trunk/psastro/src/psastro.h	(revision 17933)
@@ -93,5 +93,5 @@
 psArray          *psastroReadGetstar_PS1_DEV_0 (psFits *fits);
 
-bool              psastroAstromGuessSetChip (pmFPA *fpa, pmChip *chip, pmFPAview *view, double pixelScale, bool bilevelAstrometry);
+bool              psastroAstromGuessSetChip (pmFPA *fpa, pmChip *chip, const pmFPAview *view, double pixelScale, bool bilevelAstrometry);
 bool              psastroAstromGuessSetFPA (pmFPA *fpa, bool *bilevelAstrometry);
 
Index: trunk/psastro/src/psastroAstromGuess.c
===================================================================
--- trunk/psastro/src/psastroAstromGuess.c	(revision 17786)
+++ trunk/psastro/src/psastroAstromGuess.c	(revision 17933)
@@ -163,5 +163,5 @@
 */
 
-bool psastroAstromGuessSetChip (pmFPA *fpa, pmChip *chip, pmFPAview *view, double pixelScale, bool bilevelAstrometry) {
+bool psastroAstromGuessSetChip (pmFPA *fpa, pmChip *chip, const pmFPAview *view, double pixelScale, bool bilevelAstrometry) {
 
     // read WCS data from the corresponding header