diff --git a/java/google/registry/model/domain/LrpToken.java b/java/google/registry/model/domain/LrpToken.java
index 0974aee6a..b7952fa4f 100644
--- a/java/google/registry/model/domain/LrpToken.java
+++ b/java/google/registry/model/domain/LrpToken.java
@@ -55,6 +55,7 @@ public class LrpToken extends BackupGroupRoot implements Buildable {
    * The key of the history entry for which the token was used. Given LRP is a domain application
    * phase, this should always be a {@link Type#DOMAIN_APPLICATION_CREATE}.
    */
+  @Index
   Key<HistoryEntry> redemptionHistoryEntry;
   
   public String getToken() {
diff --git a/javatests/google/registry/model/domain/LrpTokenTest.java b/javatests/google/registry/model/domain/LrpTokenTest.java
index bf5f261de..989bbcdf5 100644
--- a/javatests/google/registry/model/domain/LrpTokenTest.java
+++ b/javatests/google/registry/model/domain/LrpTokenTest.java
@@ -86,6 +86,6 @@ public class LrpTokenTest extends EntityTestCase {
 
   @Test
   public void testIndexing() throws Exception {
-    verifyIndexing(redeemedToken, "assignee", "token");
+    verifyIndexing(redeemedToken, "assignee", "token", "redemptionHistoryEntry");
   }
 }