diff --git a/api/current.txt b/api/current.txt
index 5e7fa591385e0..b75c441904087 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -32057,7 +32057,6 @@ package android.os {
     ctor public Build.VERSION();
     field public static final java.lang.String BASE_OS;
     field public static final java.lang.String CODENAME;
-    field public static final int FIRST_SDK_INT;
     field public static final java.lang.String INCREMENTAL;
     field public static final int MIN_SUPPORTED_TARGET_SDK_INT;
     field public static final int PREVIEW_SDK_INT;
diff --git a/api/test-current.txt b/api/test-current.txt
index e84d204919f09..11e19eac8817d 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -481,6 +481,7 @@ package android.net {
 package android.os {
 
   public static class Build.VERSION {
+    field public static final int FIRST_SDK_INT;
     field public static final int RESOURCES_SDK_INT;
   }
 
diff --git a/core/java/android/os/Build.java b/core/java/android/os/Build.java
index df6ce8e85601b..e22c65fee4cf0 100644
--- a/core/java/android/os/Build.java
+++ b/core/java/android/os/Build.java
@@ -242,7 +242,9 @@ public class Build {
          * Possible values are defined in {@link Build.VERSION_CODES}.
          *
          * @see #SDK_INT
+         * @hide
          */
+        @TestApi
         public static final int FIRST_SDK_INT = SystemProperties
                 .getInt("ro.product.first_api_level", 0);