diff --git a/DataMapper/DataMapper.php b/DataMapper/DataMapper.php
index 591860d..8f2c5b1 100644
--- a/DataMapper/DataMapper.php
+++ b/DataMapper/DataMapper.php
@@ -148,9 +148,13 @@ public function asClass(?string $class = null): self
     /**
      * @inheritDoc
      */
-    public function asObject(): self
+    public function asObject(?object $obj = null): self
     {
-        $this->getStatement()->setFetchMode(PDO::FETCH_OBJ);
+        if (null !== $obj) {
+            $this->getStatement()->setFetchMode(PDO::FETCH_INTO, $obj);
+        } else {
+            $this->getStatement()->setFetchMode(PDO::FETCH_OBJ);
+        }
 
         return $this;
     }
diff --git a/DataMapper/Interfaces/DataMapperInterface.php b/DataMapper/Interfaces/DataMapperInterface.php
index 3bb1189..1571c88 100644
--- a/DataMapper/Interfaces/DataMapperInterface.php
+++ b/DataMapper/Interfaces/DataMapperInterface.php
@@ -82,10 +82,11 @@ public function numRows(): int;
     public function asClass(?string $class = null): self;
 
     /**
+     * @param null|object $obj
      * @return self
      * @throws DataMapperException
      */
-    public function asObject(): self;
+    public function asObject(?object $obj = null): self;
 
     /**
      * @return self