diff --git a/src/diagnostics/default_diagnostics.jl b/src/diagnostics/default_diagnostics.jl
index e255d0f800..158dc7cc51 100644
--- a/src/diagnostics/default_diagnostics.jl
+++ b/src/diagnostics/default_diagnostics.jl
@@ -70,6 +70,7 @@ function default_diagnostics(land_model::BucketModel, t_start; output_writer)
 end
 
 # SoilCanopyModel
+# TO DO: short and long list of variables
 function default_diagnostics(
     land_model::SoilCanopyModel,
     t_start;