diff --git a/Readme.md b/Readme.md
index 88b2c95b..75030749 100644
--- a/Readme.md
+++ b/Readme.md
@@ -29,7 +29,7 @@ The build script for this project uses [Cake][62].  To run the build, you can us
 
 ```
 cd Google.Core
-sh ../build.sh -target libs
+sh ../build.sh --target libs
 ```
 
 The bootstrapper script will automatically download Cake.exe and all the required tools and files into the `./tools/` folder.