Index: trunk/psastro/src/psastroMosaicHeaders.c
===================================================================
--- trunk/psastro/src/psastroMosaicHeaders.c	(revision 8860)
+++ trunk/psastro/src/psastroMosaicHeaders.c	(revision 9069)
@@ -44,6 +44,7 @@
     psMetadata *mosaic = pmAstromWriteBilevelMosaic (fpa->projection, fpa->toTangentPlane, plateScale);
 
+    // XXX what is the EXTNAME??
     psFits *fits = psFitsOpen (mosastro, "w");
-    psFitsWriteBlank(fits, mosaic);
+    psFitsWriteBlank(fits, mosaic, "");
     psFitsClose (fits);