diff --git a/README.md b/README.md
index a59bd51..18827d5 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ mvn install -Dexternal.version-qualifier=rc1
 Add a version qualifier to all non-master branches
 
 ```
-mvn install -Dexternal.version-qualifier=$(git symbolic-ref --short HEAD| sed s_^master$__)
+mvn install -Dexternal.version-qualifier=$(git symbolic-ref --short HEAD| sed s_^master\$__)
 ```
 
 Or how about a short git hash?