diff --git a/src/core/lombok/Builder.java b/src/core/lombok/Builder.java
index 06ca3853b..9766c0427 100644
--- a/src/core/lombok/Builder.java
+++ b/src/core/lombok/Builder.java
@@ -111,7 +111,7 @@
  * @see Singular
  */
 @Target({TYPE, METHOD, CONSTRUCTOR})
-@Retention(SOURCE)
+@Retention(RetentionPolicy.SOURCE)
 public @interface Builder {
 	/**
 	 * The field annotated with {@code @Default} must have an initializing expression; that expression is taken as the default to be used if not explicitly set during building.