diff --git a/dummy/src/main/java/android/os/Environment.java b/dummy/src/main/java/android/os/Environment.java
index d79cc2ffe9..5d58fc313a 100644
--- a/dummy/src/main/java/android/os/Environment.java
+++ b/dummy/src/main/java/android/os/Environment.java
@@ -1,7 +1,9 @@
 package android.os;
 
+import java.io.File;
+
 public final class Environment {
-    public static String getExternalStorageDirectory() {
+    public static File getExternalStorageDirectory() {
         throw new UnsupportedOperationException("Stub");
     }
 }