diff --git a/lib/Doctrine/ORM/AbstractQuery.php b/lib/Doctrine/ORM/AbstractQuery.php
index fd1766923..9d0a2da27 100644
--- a/lib/Doctrine/ORM/AbstractQuery.php
+++ b/lib/Doctrine/ORM/AbstractQuery.php
@@ -548,7 +548,8 @@ abstract class AbstractQuery
         } else {
             $sql = $this->getSql();
             ksort($this->_hints);
-            return md5(implode(";", (array)$sql) . var_export($params, true) . var_export($this->_hints, true));
+            return md5(implode(";", (array)$sql) . var_export($params, true) .
+                var_export($this->_hints, true)."&hydrationMode=".$this->_hydrationMode);
         }
     }
 
diff --git a/lib/Doctrine/ORM/Query.php b/lib/Doctrine/ORM/Query.php
index 5a4bc9d3b..80f13bc33 100644
--- a/lib/Doctrine/ORM/Query.php
+++ b/lib/Doctrine/ORM/Query.php
@@ -448,7 +448,8 @@ final class Query extends AbstractQuery
 
         return md5(
             $this->getDql() . var_export($this->_hints, true) . 
-            'firstResult='.$this->_firstResult.'&maxResult='.$this->_maxResults.'DOCTRINE_QUERY_CACHE_SALT'
+            '&firstResult=' . $this->_firstResult . '&maxResult=' . $this->_maxResults .
+            '&hydrationMode='.$this->_hydrationMode.'DOCTRINE_QUERY_CACHE_SALT'
         );
     }
 }
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/ORM/Functional/QueryCacheTest.php b/tests/Doctrine/Tests/ORM/Functional/QueryCacheTest.php
index 504db0abe..1d95d0ca1 100644
--- a/tests/Doctrine/Tests/ORM/Functional/QueryCacheTest.php
+++ b/tests/Doctrine/Tests/ORM/Functional/QueryCacheTest.php
@@ -67,6 +67,19 @@ class QueryCacheTest extends \Doctrine\Tests\OrmFunctionalTestCase
         $this->assertEquals($cacheCount + 1, count($cache->getIds()));
     }
 
+    /**
+     * @param <type> $query
+     * @depends testQueryCache_DependsOnHints
+     */
+    public function testQueryCache_DependsOnHydrationMode($query)
+    {
+        $cache = $query->getQueryCacheDriver();
+        $cacheCount = count($cache->getIds());
+
+        $query->getArrayResult();
+        $this->assertEquals($cacheCount + 1, count($cache->getIds()));
+    }
+
     public function testQueryCache_NoHitSaveParserResult()
     {
         $this->_em->getConfiguration()->setQueryCacheImpl(null);
diff --git a/tests/Doctrine/Tests/ORM/Functional/ResultCacheTest.php b/tests/Doctrine/Tests/ORM/Functional/ResultCacheTest.php
index cfd1e39f5..05bd8333d 100644
--- a/tests/Doctrine/Tests/ORM/Functional/ResultCacheTest.php
+++ b/tests/Doctrine/Tests/ORM/Functional/ResultCacheTest.php
@@ -131,4 +131,19 @@ class ResultCacheTest extends \Doctrine\Tests\OrmFunctionalTestCase
 
         $this->assertEquals($cacheCount + 1, count($cache->getIds()));
     }
+
+    /**
+     * @param <type> $query
+     * @depends testNativeQueryResultCaching
+     */
+    public function testResultCacheDependsOnHydrationMode($query)
+    {
+        $cache = $query->getResultCacheDriver();
+        $cacheCount = count($cache->getIds());
+
+        $this->assertNotEquals(\Doctrine\ORM\Query::HYDRATE_ARRAY, $query->getHydrationMode());
+        $query->getArrayResult();
+
+        $this->assertEquals($cacheCount + 1, count($cache->getIds()));
+    }
 }
\ No newline at end of file