diff --git a/conf/local.conf.sample b/conf/local.conf.sample
index 4463f3b..9cd4fb4 100644
--- a/conf/local.conf.sample
+++ b/conf/local.conf.sample
@@ -14,7 +14,7 @@ BB_DISKMON_DIRS = "\
     ABORT,/tmp,10M,1K"
 ASSUME_PROVIDED += "libsdl-native"
 CONF_VERSION = "1"
-IMAGE_FEATURES_append = " debug-tweaks"
+EXTRA_IMAGE_FEATURES_append = " debug-tweaks"
 
 INHERIT += "rm_work"