diff --git a/monetio/models/cmaq.py b/monetio/models/cmaq.py
index 9ff92e66..a811ab47 100644
--- a/monetio/models/cmaq.py
+++ b/monetio/models/cmaq.py
@@ -467,7 +467,7 @@ def add_lazy_rh(d):
 
 def add_lazy_nox(d):
     keys = _get_keys(d)
-    allvars = Series(["NO", "NOX"])
+    allvars = Series(["NO", "NO2"])
     index = allvars.isin(keys)
     if can_do(index):
         newkeys = allvars.loc[index]