diff --git a/src/UuidBinaryOrderedTimeType.php b/src/UuidBinaryOrderedTimeType.php
index 994ba05..8f75f1a 100644
--- a/src/UuidBinaryOrderedTimeType.php
+++ b/src/UuidBinaryOrderedTimeType.php
@@ -54,6 +54,7 @@ class UuidBinaryOrderedTimeType extends Type
      *
      * @param array $fieldDeclaration
      * @param AbstractPlatform $platform
+     * @return string
      */
     public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
     {
diff --git a/src/UuidBinaryType.php b/src/UuidBinaryType.php
index 1774471..37c95d9 100644
--- a/src/UuidBinaryType.php
+++ b/src/UuidBinaryType.php
@@ -37,6 +37,7 @@ class UuidBinaryType extends Type
      *
      * @param array $fieldDeclaration
      * @param AbstractPlatform $platform
+     * @return string
      */
     public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
     {