diff --git a/README.md b/README.md
index c79de25..2e055c4 100644
--- a/README.md
+++ b/README.md
@@ -193,7 +193,7 @@ therefore, `-o false` does not work.
 
 ## `std::vector<T>` values
 
-Parsing of list of values in form of an `std::vector<T>` is also supported, as long as `T`
+Parsing of list of values in form of a `std::vector<T>` is also supported, as long as `T`
 can be parsed. To separate single values in a list the definition `CXXOPTS_VECTOR_DELIMITER`
 is used, which is ',' by default. Ensure that you use no whitespaces between values because
 those would be interpreted as the next command line option. Example for a command line option