Index: /trunk/psastro/src/psastroConvert.c
===================================================================
--- /trunk/psastro/src/psastroConvert.c	(revision 15364)
+++ /trunk/psastro/src/psastroConvert.c	(revision 15365)
@@ -93,6 +93,6 @@
 
         // is the source magnitude calibrated in any sense?
-        obj->pix->x = PAR[2];
-        obj->pix->y = PAR[3];
+        obj->pix->x = PAR[PM_PAR_XPOS];
+        obj->pix->y = PAR[PM_PAR_YPOS];
         obj->Mag = source->psfMag;