diff --git a/api/current.txt b/api/current.txt
index 2577084d211d4..fd7883e062906 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -51809,6 +51809,7 @@ 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 bfdf36ac54839..16bc951785dac 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -55332,6 +55332,7 @@ 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 {