diff --git a/client/galaxy/scripts/components/RuleCollectionBuilder.vue b/client/galaxy/scripts/components/RuleCollectionBuilder.vue
index bba1152fc17..23210f98975 100644
--- a/client/galaxy/scripts/components/RuleCollectionBuilder.vue
+++ b/client/galaxy/scripts/components/RuleCollectionBuilder.vue
@@ -1962,7 +1962,7 @@ export default {
                 this.addColumnRegexGroupCount = 1;
             }
             if (val == "replacement") {
-                this.addColumnRegexReplacement = "\0";
+                this.addColumnRegexReplacement = null;
             }
         }
     },