diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index f2259fd..83d8ce8 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -9905,7 +9905,7 @@ Arithmetic rules:
 
 Code using a library can be much easier to write than code working directly with language features, much shorter, tend to be of a higher level of abstraction, and the library code is presumably already tested.
 The ISO C++ Standard Library is among the most widely known and best tested libraries.
-It is available as part of all C++ Implementations.
+It is available as part of all C++ implementations.
 
 ##### Example