diff --git a/android/guava/src/com/google/common/net/HttpHeaders.java b/android/guava/src/com/google/common/net/HttpHeaders.java
index 294e8bdefe35..a66c153879d8 100644
--- a/android/guava/src/com/google/common/net/HttpHeaders.java
+++ b/android/guava/src/com/google/common/net/HttpHeaders.java
@@ -883,6 +883,14 @@ private ReferrerPolicyValues() {}
    */
   public static final String AD_AUCTION_SIGNALS = "Ad-Auction-Signals";
 
+  /**
+   * The HTTP <a href="https://wicg.github.io/turtledove/#http-headerdef-ad-auction-allowed">{@code
+   * Ad-Auction-Allowed}</a> header field name.
+   *
+   * @since NEXT
+   */
+  public static final String AD_AUCTION_ALLOWED = "Ad-Auction-Allowed";
+
   /**
    * The HTTP <a href="https://tools.ietf.org/html/rfc8586">{@code CDN-Loop}</a> header field name.
    *
diff --git a/guava/src/com/google/common/net/HttpHeaders.java b/guava/src/com/google/common/net/HttpHeaders.java
index 294e8bdefe35..a66c153879d8 100644
--- a/guava/src/com/google/common/net/HttpHeaders.java
+++ b/guava/src/com/google/common/net/HttpHeaders.java
@@ -883,6 +883,14 @@ private ReferrerPolicyValues() {}
    */
   public static final String AD_AUCTION_SIGNALS = "Ad-Auction-Signals";
 
+  /**
+   * The HTTP <a href="https://wicg.github.io/turtledove/#http-headerdef-ad-auction-allowed">{@code
+   * Ad-Auction-Allowed}</a> header field name.
+   *
+   * @since NEXT
+   */
+  public static final String AD_AUCTION_ALLOWED = "Ad-Auction-Allowed";
+
   /**
    * The HTTP <a href="https://tools.ietf.org/html/rfc8586">{@code CDN-Loop}</a> header field name.
    *