diff --git a/api/current.txt b/api/current.txt
index 28498fffb965c..a1772d1b90ab5 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -49279,6 +49279,7 @@ package java.lang {
     method protected T initialValue();
     method public void remove();
     method public void set(T);
+    method public static java.lang.ThreadLocal<S> withInitial(java.util.function.Supplier<? extends S>);
   }
 
   public class Throwable implements java.io.Serializable {
diff --git a/api/system-current.txt b/api/system-current.txt
index 6092433e7b340..d04dfa080fb49 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -51897,6 +51897,7 @@ package java.lang {
     method protected T initialValue();
     method public void remove();
     method public void set(T);
+    method public static java.lang.ThreadLocal<S> withInitial(java.util.function.Supplier<? extends S>);
   }
 
   public class Throwable implements java.io.Serializable {