diff --git a/pico/compat/src/com/android/tts/compat/SynthProxy.java b/pico/compat/src/com/android/tts/compat/SynthProxy.java
index 68d0d92..58b2a50 100755
--- a/pico/compat/src/com/android/tts/compat/SynthProxy.java
+++ b/pico/compat/src/com/android/tts/compat/SynthProxy.java
@@ -139,8 +139,9 @@
     /**
      * Shuts down the native synthesizer.
      */
-    public void shutdown()  {
+    public void shutdown() {
         native_shutdown(mJniData);
+        mJniData = 0;
     }
 
     @Override