diff --git a/src/Query/StickyFilterGambit.php b/src/Query/StickyFilterGambit.php
index a52b0a4..5ce083e 100644
--- a/src/Query/StickyFilterGambit.php
+++ b/src/Query/StickyFilterGambit.php
@@ -32,7 +32,7 @@ public function getFilterKey(): string
         return 'sticky';
     }
 
-    public function filter(FilterState $filterState, string $filterValue, $negate)
+    public function filter(FilterState $filterState, $filterValue, $negate)
     {
         $this->constrain($filterState->getQuery(), $negate);
     }