diff --git a/README b/README
index 94a1f11..8b3f467 100644
--- a/README
+++ b/README
@@ -14,6 +14,8 @@ Options can be given as:
 
 where c takes an argument, but a and b do not.
 
+Additionally, anything after `--` will be parsed as a positional argument.
+
 How to use:
 
     #include <cxxopts.hpp>
@@ -50,7 +52,7 @@ This is a header only library.
 
 == Requirements ==
 
-The only build requirement is a C++ compiler that supports C++11 regular 
+The only build requirement is a C++ compiler that supports C++11 regular
 expressions. For example GCC >= 4.9 or clang with libc++.