diff --git a/src/SearchableTrait.php b/src/SearchableTrait.php
index 53ac354..32604fd 100644
--- a/src/SearchableTrait.php
+++ b/src/SearchableTrait.php
@@ -52,7 +52,7 @@ public function scopeSearch(Builder $q, $search, $threshold = null)
         }
 
         $this->addSelectsToQuery($query, $selects);
-        $this->filterQueryWithRelevance($query, $selects, $threshold ?: ($relevance_count / 4));
+        $this->filterQueryWithRelevance($query, $selects, !is_null($threshold)? $threshold: ($relevance_count / 4));
 
         $this->makeGroupBy($query);