diff --git a/readme.md b/readme.md
index 7d4d1e9..dde8e22 100644
--- a/readme.md
+++ b/readme.md
@@ -10,7 +10,7 @@ the default allows ssh access (22/tcp) to the host only.
 ## Scripted installation
 
 ```
-bash -c "$curl -fsSL https://git.xo.nl/marcel/iptables/raw/master/install.sh)"
+bash -c "$(curl -fsSL https://git.xo.nl/marcel/iptables/raw/master/install.sh)"
 ```
 
 ## Manual installation