diff --git a/docs/en/cookbook/advanced-field-value-conversion-using-custom-mapping-types.rst b/docs/en/cookbook/advanced-field-value-conversion-using-custom-mapping-types.rst
index e3884915c..5bbd2a3b1 100644
--- a/docs/en/cookbook/advanced-field-value-conversion-using-custom-mapping-types.rst
+++ b/docs/en/cookbook/advanced-field-value-conversion-using-custom-mapping-types.rst
@@ -150,7 +150,7 @@ Now we're going to create the ``point`` type and implement all required methods.
             return self::POINT;
         }
 
-        public function getSqlDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
+        public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
         {
             return 'POINT';
         }