diff --git a/src/Filterable.php b/src/Filterable.php
index 950d3c7..e56eafc 100644
--- a/src/Filterable.php
+++ b/src/Filterable.php
@@ -8,8 +8,11 @@ public function scopeFilter($query, array $filterData = [])
     {
         foreach ($filterData as $key => $value) {
             if (is_null($value) || $value === '') continue;
-            if (method_exists($this, 'scope' . ucfirst(camel_case($key)))) {
-                $query->{ucfirst(camel_case($key))}($value);
+
+            $scopeName = ucfirst(camel_case($key));
+
+            if (method_exists($this, 'scope' . $scopeName)) {
+                $query->$scopeName($value);
             } else if (is_array($value)) {
                 $query->whereIn($key, $value);
             } else {