diff --git a/api/current.txt b/api/current.txt
index 554afa3592546..fde401c52acdc 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -49281,6 +49281,7 @@ 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 722d682095dfa..665123f92e134 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -51899,6 +51899,7 @@ 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 {