diff --git a/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/spi/v1/HttpStorageRpc.java b/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/spi/v1/HttpStorageRpc.java
index ec7d8e02e411..7dde88455e11 100644
--- a/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/spi/v1/HttpStorageRpc.java
+++ b/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/spi/v1/HttpStorageRpc.java
@@ -826,6 +826,7 @@ public StorageObject compose(
           storage
               .objects()
               .compose(target.getBucket(), target.getName(), request)
+              .setDestinationPredefinedAcl(Option.PREDEFINED_ACL.getString(targetOptions))
               .setIfMetagenerationMatch(Option.IF_METAGENERATION_MATCH.getLong(targetOptions))
               .setIfGenerationMatch(Option.IF_GENERATION_MATCH.getLong(targetOptions))
               .setUserProject(Option.USER_PROJECT.getString(targetOptions));
diff --git a/java-storage/google-cloud-storage/src/test/java/com/google/cloud/storage/spi/v1/HttpStorageRpcComposeTest.java b/java-storage/google-cloud-storage/src/test/java/com/google/cloud/storage/spi/v1/HttpStorageRpcComposeTest.java
new file mode 100644
index 000000000000..e39dd7a87baf
--- /dev/null
+++ b/java-storage/google-cloud-storage/src/test/java/com/google/cloud/storage/spi/v1/HttpStorageRpcComposeTest.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.storage.spi.v1;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.api.client.testing.http.MockLowLevelHttpResponse;
+import com.google.api.services.storage.model.StorageObject;
+import com.google.cloud.NoCredentials;
+import com.google.cloud.TransportOptions;
+import com.google.cloud.Tuple;
+import com.google.cloud.http.HttpTransportOptions;
+import com.google.cloud.storage.StorageOptions;
+import com.google.cloud.storage.spi.v1.StorageRpc.Option;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import java.util.List;
+import java.util.Map;
+import org.junit.Test;
+
+public final class HttpStorageRpcComposeTest {
+
+  private static final String BUCKET = "test-bucket";
+
+  @Test
+  public void compose_forwardsPredefinedAcl() throws Exception {
+    String url = composeAndCaptureUrl(ImmutableMap.of(Option.PREDEFINED_ACL, "publicRead"));
+
+    assertThat(url).contains("destinationPredefinedAcl=publicRead");
+  }
+
+  @Test
+  public void compose_withoutPredefinedAclSendsNone() throws Exception {
+    String url = composeAndCaptureUrl(ImmutableMap.of());
+
+    assertThat(url).doesNotContain("destinationPredefinedAcl");
+  }
+
+  private String composeAndCaptureUrl(Map<Option, ?> targetOptions) throws Exception {
+    MockLowLevelHttpResponse response =
+        new MockLowLevelHttpResponse()
+            .setContentType("application/json")
+            .setContent("{\"bucket\":\"" + BUCKET + "\",\"name\":\"destination\"}")
+            .setStatusCode(200);
+    AuditingHttpTransport transport = new AuditingHttpTransport(response);
+    TransportOptions transportOptions =
+        HttpTransportOptions.newBuilder().setHttpTransportFactory(() -> transport).build();
+    StorageOptions options =
+        StorageOptions.getDefaultInstance().toBuilder()
+            .setProjectId("test-project")
+            .setCredentials(NoCredentials.getInstance())
+            .setTransportOptions(transportOptions)
+            .build();
+
+    StorageObject source = new StorageObject().setBucket(BUCKET).setName("source");
+    StorageObject target = new StorageObject().setBucket(BUCKET).setName("destination");
+    new HttpStorageRpc(options).compose(ImmutableList.of(source), target, targetOptions);
+
+    List<Tuple<String, String>> calls = transport.getBuildRequestCalls();
+    assertThat(calls).hasSize(1);
+    return calls.get(0).y();
+  }
+}