diff --git a/lib/Doctrine/ORM/EntityManager.php b/lib/Doctrine/ORM/EntityManager.php
index e9ea2acda..e36dd4047 100644
--- a/lib/Doctrine/ORM/EntityManager.php
+++ b/lib/Doctrine/ORM/EntityManager.php
@@ -238,7 +238,7 @@ use Doctrine\Common\Util\ClassUtils;
             return $return ?: true;
         } catch (Exception $e) {
             $this->close();
-            $this->conn->rollback();
+            $this->conn->rollBack();
 
             throw $e;
         }
@@ -257,7 +257,7 @@ use Doctrine\Common\Util\ClassUtils;
      */
     public function rollback()
     {
-        $this->conn->rollback();
+        $this->conn->rollBack();
     }
 
     /**
diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index 3ba860b89..2732465a3 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -410,7 +410,7 @@ class UnitOfWork implements PropertyChangedListener
             $conn->commit();
         } catch (Exception $e) {
             $this->em->close();
-            $conn->rollback();
+            $conn->rollBack();
 
             $this->afterTransactionRolledBack();