diff --git a/packages/ExternalStorageProvider/src/com/android/externalstorage/ExternalStorageProvider.java b/packages/ExternalStorageProvider/src/com/android/externalstorage/ExternalStorageProvider.java
index 78b99274e444b..7fe0d2fd074ab 100644
--- a/packages/ExternalStorageProvider/src/com/android/externalstorage/ExternalStorageProvider.java
+++ b/packages/ExternalStorageProvider/src/com/android/externalstorage/ExternalStorageProvider.java
@@ -566,6 +566,7 @@ public class ExternalStorageProvider extends DocumentsProvider {
             throws FileNotFoundException {
         final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
 
+        query = query.toLowerCase();
         final File parent;
         synchronized (mRootsLock) {
             parent = mRoots.get(rootId).path;