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-rw-r--r--lib/stwcs/wcsutil/hstwcs.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/stwcs/wcsutil/hstwcs.py b/lib/stwcs/wcsutil/hstwcs.py
index 4bd6eb0..978ab4f 100644
--- a/lib/stwcs/wcsutil/hstwcs.py
+++ b/lib/stwcs/wcsutil/hstwcs.py
@@ -384,7 +384,7 @@ class HSTWCS(WCS):
If True - include SIP coefficients
"""
- h = self.to_header(wkey=wcskey, relax=relax)
+ h = self.to_header(key=wcskey, relax=relax)
if not wcskey:
wcskey = self.wcs.alt
if self.wcs.has_cd():