diff --git a/src/core/include/mp-units/bits/quantity_point_concepts.h b/src/core/include/mp-units/bits/quantity_point_concepts.h
index 90a9e85b..df4b1a24 100644
--- a/src/core/include/mp-units/bits/quantity_point_concepts.h
+++ b/src/core/include/mp-units/bits/quantity_point_concepts.h
@@ -60,7 +60,7 @@ concept AbsolutePointOrigin =
 /**
  * @brief A concept matching all quantity points in the library
  *
- * Satisfied by all types being a either specialization or derived from `quantity_point`
+ * Satisfied by all types being either a specialization or derived from `quantity_point`
  */
 template<typename T>
 concept QuantityPoint = detail::is_quantity_point<T>;