Index: trunk/ppTranslate/src/ppMopsWrite.c
===================================================================
--- trunk/ppTranslate/src/ppMopsWrite.c	(revision 28209)
+++ trunk/ppTranslate/src/ppMopsWrite.c	(revision 28212)
@@ -36,5 +36,5 @@
         psMetadataAddStr(header, PS_LIST_TAIL, "OBSCODE", 0, "IAU Observatory code", OBSERVATORY_CODE);
 
-        if (!psFitsWriteBlank(fits, header)) {
+        if (!psFitsWriteBlank(fits, header, NULL)) {
             psError(psErrorCodeLast(), false, "Unable to write primary header");
             return false;