diff --git a/src/Query/FunctionScoreQuery.php b/src/Query/FunctionScoreQuery.php
index 68f51b49f105dd6f58f42822574998579d2f9adc..990297e4b1c061982ac05a8d48016ecddee0a90f 100644
--- a/src/Query/FunctionScoreQuery.php
+++ b/src/Query/FunctionScoreQuery.php
@@ -117,10 +117,10 @@ class FunctionScoreQuery implements BuilderInterface
         BuilderInterface $filter = null
     ) {
         $function = [
-            $type => [
-                $field => $function,
-            ],
-            $options
+            $type => array_merge(
+                [$field => $function],
+                $options
+            )
         ];
 
         $this->applyFilter($function, $filter);