diff --git a/media/java/android/media/RingtoneManager.java b/media/java/android/media/RingtoneManager.java
index fefa1ed..0dddaf5 100644
--- a/media/java/android/media/RingtoneManager.java
+++ b/media/java/android/media/RingtoneManager.java
@@ -952,7 +952,8 @@
 
         // Find a filename. Throws FileNotFoundException if none can be found.
         final File outFile = Utils.getUniqueExternalFile(mContext, subdirectory,
-                Utils.getFileDisplayNameFromUri(mContext, fileUri), mimeType);
+                FileUtils.buildValidFatFilename(Utils.getFileDisplayNameFromUri(mContext, fileUri)),
+                        mimeType);
 
         // Copy contents to external ringtone storage. Throws IOException if the copy fails.
         try (final InputStream input = mContext.getContentResolver().openInputStream(fileUri);