diff --git a/defaults/main/9_merge.yml b/defaults/main/9_merge.yml
index 0182da9..4bef066 100644
--- a/defaults/main/9_merge.yml
+++ b/defaults/main/9_merge.yml
@@ -1,3 +1,3 @@
 ---
 
-WAF_CONFIG: "{{ defaults_waf | combine(waf, recursive=true, list_merge='prepend') }}"
+WAF_CONFIG: "{{ defaults_waf | combine(waf, recursive=true) }}"