diff --git a/spectrum.py b/spectrum.py
index 42caafc..cc09692 100755
--- a/spectrum.py
+++ b/spectrum.py
@@ -711,7 +711,10 @@ else:
     main_hdu.header[ 'RADECSYS' ] = 'FKS'
     main_hdu.header[ 'OBS-ID'   ] = head[ 'OBS_ID' ]
     main_hdu.header[ 'DATE-NUM' ] = head[ 'DATE' ]
-    main_hdu.header[ 'COMMENT'  ] = head[ 'COMMENT' ]
+    main_hdu.header[ 'COMMENT'  ] = str(head[ 'COMMENT' ]).replace(
+        '\n'  ,
+        '<CR>',
+    )
     main_hdu.header[ 'POLICY'   ] = head[ 'POLICY' ]
 
     # BSS keywords