diff --git a/app/javascript/figgy/form/detect_duplicates.js b/app/javascript/figgy/form/detect_duplicates.js
index 97dc6b06e6..46aca5e35d 100644
--- a/app/javascript/figgy/form/detect_duplicates.js
+++ b/app/javascript/figgy/form/detect_duplicates.js
@@ -15,7 +15,7 @@ class DuplicateResourceDetector {
 
   setQueryUrl() {
     this.value = this.$element.val()
-    this.queryUrl = `/catalog?f[${this.field}][]=${this.value}`
+    this.queryUrl = `/catalog?q=${this.field}:${this.value}`
     if(this.existing)
       this.queryUrl += `&q=NOT+id:${this.existing}`
   }