diff --git a/interfaces/cython/cantera/ck2yaml.py b/interfaces/cython/cantera/ck2yaml.py
index d802df0a8d..1d47270ead 100644
--- a/interfaces/cython/cantera/ck2yaml.py
+++ b/interfaces/cython/cantera/ck2yaml.py
@@ -111,7 +111,6 @@ def float2string(data):
         return repr(data)
 
 def represent_float(self, data):
-    # type: (Any) -> Any
     if data != data:
         value = '.nan'
     elif data == self.inf_value: