Index: trunk/ppMops/src/ppMops.c
===================================================================
--- trunk/ppMops/src/ppMops.c	(revision 24339)
+++ trunk/ppMops/src/ppMops.c	(revision 24385)
@@ -138,5 +138,5 @@
         psMetadataAddF64(outHeader, PS_LIST_TAIL, "DIFFIMID", 0, "Difference image identifier", imageid);
         psMetadataAddF64(outHeader, PS_LIST_TAIL, "FPA_ID", 0, "Exposure identifier", fpaid);
-        psMetadataAddS32(outHeader, PS_LIST_TAIL, "OBSCODE", 0, "IAU Observatory code", OBSERVATORY_CODE);
+        psMetadataAddStr(outHeader, PS_LIST_TAIL, "OBSCODE", 0, "IAU Observatory code", OBSERVATORY_CODE);
         psMetadataAddF32(outHeader, PS_LIST_TAIL, "STARPSF", 0, "Stellar PSF (arcsec)", psf);