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-rw-r--r--stwcs/wcsutil/altwcs.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/stwcs/wcsutil/altwcs.py b/stwcs/wcsutil/altwcs.py
index 2d1565d..043d535 100644
--- a/stwcs/wcsutil/altwcs.py
+++ b/stwcs/wcsutil/altwcs.py
@@ -561,7 +561,7 @@ def convertAltWCS(fobj, ext, oldkey=" ", newkey=' '):
cname = card
else:
cname = card.rstrip(oldkey)
- hdr.rename_key(card, cname + newkey, force=True)
+ hdr.rename_keyword(card, cname + newkey, force=True)
return hdr