diff --git a/README.md b/README.md
index 1e05232..f8c6b95 100644
--- a/README.md
+++ b/README.md
@@ -148,7 +148,7 @@ In addition, dimensional analysis can be performed regardless of the order in wh
 
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-**NOTE** : If you are not working on a physics problem and all your variables/constants are dimensionless, do not specify the units arguments (or specify them as `[0,0]` for all variables/constants) and `physo` will perform a dimensionless symbolic regression task.
+**NOTE** : If you are not working on a physics problem and all your variables/constants are dimensionless, do not specify any of the `xx_units` arguments (or specify them as `[0,0]` for all variables/constants) and `physo` will perform a dimensionless symbolic regression task.
 
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diff --git a/docs/source/doc_getting_started_sr.md b/docs/source/doc_getting_started_sr.md
index 823827c..d8565f0 100644
--- a/docs/source/doc_getting_started_sr.md
+++ b/docs/source/doc_getting_started_sr.md
@@ -32,7 +32,7 @@ In addition, dimensional analysis can be performed regardless of the order in wh
 
 ---
 
-**NOTE** : If you are not working on a physics problem and all your variables/constants are dimensionless, do not specify the units arguments (or specify them as `[0,0]` for all variables/constants) and `physo` will perform a dimensionless symbolic regression task.
+**NOTE** : If you are not working on a physics problem and all your variables/constants are dimensionless, do not specify any of the `xx_units` arguments (or specify them as `[0,0]` for all variables/constants) and `physo` will perform a dimensionless symbolic regression task.
 
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