diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index 22b9f4a..2c0a505 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -17057,7 +17057,7 @@ and the precise general semantics for all nodes is hard to pin down in the early
 A "concept" that is incomplete or without a well-specified semantics can still be useful.
 For example, it allows for some checking during initial experimentation.
 However, it should not be assumed to be stable.
-Each new use case may require such an incomplete concepts to be improved.
+Each new use case may require such an incomplete concept to be improved.
 
 ##### Enforcement