diff --git a/core/java/com/google/android/collect/Lists.java b/core/java/com/google/android/collect/Lists.java
index c029bb20d24c2..3ea873bbb0f93 100644
--- a/core/java/com/google/android/collect/Lists.java
+++ b/core/java/com/google/android/collect/Lists.java
@@ -16,6 +16,7 @@
 
 package com.google.android.collect;
 
+import android.annotation.UnsupportedAppUsage;
 import java.util.ArrayList;
 import java.util.Collections;
 
@@ -33,6 +34,7 @@ public class Lists {
      *
      * @return a newly-created, initially-empty {@code ArrayList}
      */
+    @UnsupportedAppUsage
     public static <E> ArrayList<E> newArrayList() {
         return new ArrayList<E>();
     }
diff --git a/core/java/com/google/android/collect/Maps.java b/core/java/com/google/android/collect/Maps.java
index fc2c9feb8068d..6ba33207631aa 100644
--- a/core/java/com/google/android/collect/Maps.java
+++ b/core/java/com/google/android/collect/Maps.java
@@ -16,6 +16,7 @@
 
 package com.google.android.collect;
 
+import android.annotation.UnsupportedAppUsage;
 import android.util.ArrayMap;
 
 import java.util.HashMap;
@@ -29,6 +30,7 @@ public class Maps {
      *
      * @return a newly-created, initially-empty {@code HashMap}
      */
+    @UnsupportedAppUsage
     public static <K, V> HashMap<K, V> newHashMap() {
         return new HashMap<K, V>();
     }