diff --git a/iam_units/update.py b/iam_units/update.py
index 9285714..e920071 100644
--- a/iam_units/update.py
+++ b/iam_units/update.py
@@ -43,7 +43,7 @@
 # - Preceded by a space or '-' character.
 # - Followed by a space, '-', '/', end-of-string, or non-word (\w) character.
 #   The latter avoids matching only the 'C' within 'CH4'.
-_EMI_CODE = fr"""{_EMI_HEADER}
+_EMI_CODE = rf"""{_EMI_HEADER}
 import re
 
 GWP_VERSION = '{gwp.__version__}'
@@ -84,6 +84,7 @@
         "CO2_eq": None,
         "CO2e": None,
         "CO2eq": None,
+        "CO2-eq": None,
         "C": "44. / 12 * ",
         "Ce": "44. / 12 * ",
     }