diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index bab3385..dc84273 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -2899,7 +2899,7 @@ However, a programmer can disable or replace these defaults.
 	Named_map nm;		// default construct
 	Named_map nm2 {nm};	// copy construct
 
-Since `std::map` and `string` have all the special functions, not further work is needed.
+Since `std::map` and `string` have all the special functions, no further work is needed.
 
 **Note**: This is known as "the rule of zero".