diff --git a/core/java/android/os/storage/StorageManager.java b/core/java/android/os/storage/StorageManager.java
index 8533c7efad84d..18f3a14694cc3 100644
--- a/core/java/android/os/storage/StorageManager.java
+++ b/core/java/android/os/storage/StorageManager.java
@@ -1083,12 +1083,14 @@ public class StorageManager {
     /** {@hide} */
     public static Pair<String, Long> getPrimaryStoragePathAndSize() {
         return Pair.create(null,
-                FileUtils.roundStorageSize(Environment.getDataDirectory().getTotalSpace()));
+                FileUtils.roundStorageSize(Environment.getDataDirectory().getTotalSpace()
+                    + Environment.getRootDirectory().getTotalSpace()));
     }
 
     /** {@hide} */
     public long getPrimaryStorageSize() {
-        return FileUtils.roundStorageSize(Environment.getDataDirectory().getTotalSpace());
+        return FileUtils.roundStorageSize(Environment.getDataDirectory().getTotalSpace()
+                + Environment.getRootDirectory().getTotalSpace());
     }
 
     /** @removed */