diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index b1012601edbc..df93cefb5abd 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -430,7 +430,7 @@ public function firstOrNew(array $attributes = [], array $values = [])
      * @param  array  $values
      * @return \Illuminate\Database\Eloquent\Model|static
      */
-    public function firstOrCreate(array $attributes, array $values = [])
+    public function firstOrCreate(array $attributes = [], array $values = [])
     {
         if (! is_null($instance = $this->where($attributes)->first())) {
             return $instance;
diff --git a/src/Illuminate/Database/Eloquent/Relations/HasOneOrMany.php b/src/Illuminate/Database/Eloquent/Relations/HasOneOrMany.php
index d015c863bf77..acff8314640e 100755
--- a/src/Illuminate/Database/Eloquent/Relations/HasOneOrMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/HasOneOrMany.php
@@ -213,7 +213,7 @@ public function findOrNew($id, $columns = ['*'])
      * @param  array  $values
      * @return \Illuminate\Database\Eloquent\Model
      */
-    public function firstOrNew(array $attributes, array $values = [])
+    public function firstOrNew(array $attributes = [], array $values = [])
     {
         if (is_null($instance = $this->where($attributes)->first())) {
             $instance = $this->related->newInstance($attributes + $values);
@@ -231,7 +231,7 @@ public function firstOrNew(array $attributes, array $values = [])
      * @param  array  $values
      * @return \Illuminate\Database\Eloquent\Model
      */
-    public function firstOrCreate(array $attributes, array $values = [])
+    public function firstOrCreate(array $attributes = [], array $values = [])
     {
         if (is_null($instance = $this->where($attributes)->first())) {
             $instance = $this->create($attributes + $values);