diff --git a/client/src/components/RuleCollectionBuilder.vue b/client/src/components/RuleCollectionBuilder.vue
index 8699b5d64d0..65128443031 100644
--- a/client/src/components/RuleCollectionBuilder.vue
+++ b/client/src/components/RuleCollectionBuilder.vue
@@ -1664,7 +1664,7 @@ export default {
                 this.addColumnRegexGroupCount = 1;
             }
             if (val == "replacement") {
-                this.addColumnRegexReplacement = "\0";
+                this.addColumnRegexReplacement = null;
             }
         },
     },