diff --git a/InCallUI/src/com/android/incallui/InCallPresenter.java b/InCallUI/src/com/android/incallui/InCallPresenter.java
index 8bec492..1402621 100644
--- a/InCallUI/src/com/android/incallui/InCallPresenter.java
+++ b/InCallUI/src/com/android/incallui/InCallPresenter.java
@@ -425,7 +425,9 @@
     }
 
     public void onPostDialCharWait(int callId, String chars) {
-        mInCallActivity.showPostCharWaitDialog(callId, chars);
+        if (isActivityStarted()) {
+            mInCallActivity.showPostCharWaitDialog(callId, chars);
+        }
     }
 
     /**