diff --git a/meta-security/README b/meta-security/README
index 4047b86..081669f 100644
--- a/meta-security/README
+++ b/meta-security/README
@@ -5,7 +5,7 @@
 to have 'security' in DISTRO_FEATURES to have effect.
 To enable them, add in configuration file the following line.
 
-  DISTRO_FEATURES_append = " security"
+  DISTRO_FEATURES:append = " security"
 
 If meta-security is included, but security  is not enabled as a
 distro feature a warning is printed at parse time: