diff --git a/pymagicc/definitions/__init__.py b/pymagicc/definitions/__init__.py
index eab7e1fd..246d9edf 100644
--- a/pymagicc/definitions/__init__.py
+++ b/pymagicc/definitions/__init__.py
@@ -341,7 +341,7 @@ def get_openscm_replacement(in_var):
             "LANDUSE_RF": "Radiative Forcing|Land-use Change",
             "BCSNOW_RF": "Radiative Forcing|Black Carbon on Snow",
             "CO2PF_EMIS": "Land to Air Flux|CO2|MAGICC Permafrost",
-            # "CH4PF_EMIS": "Land to Air Flux|CH4|MAGICC Permafrost",
+            # "CH4PF_EMIS": "Land to Air Flux|CH4|MAGICC Permafrost",  # TODO: test and then add when needed
         }
     )