diff --git a/papers/CPP21.md b/papers/CPP21.md
index 683bdc5f59d67af7f08a61f5b530412da0f0e8e5..a8ba65c63df9b3229f5b2157a9fc5ac45b811f16 100644
--- a/papers/CPP21.md
+++ b/papers/CPP21.md
@@ -25,7 +25,7 @@ contains an overview of the files in that directory.
   [theories/logrel/term_typing_judgment.v](../theories/logrel/term_typing_judgment.v)
 - Minor simplifications have been made for the displayed Coq code of Section 5,
   such as assuming that implicit variables (e.g., `{!heapG Σ}`) are available from
-  a `Context`, rather than as an implicit variable of the definitions.
+  a `Context`, rather than as implicits variables of the definitions.
   The definitions between the paper and Coq code are identical,
   as this is just refactoring.