diff --git a/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java b/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java
index 91cd3e1..09b42e9 100644
--- a/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java
+++ b/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java
@@ -78,7 +78,7 @@
         } else if (!TextUtils.isEmpty(number)) {
             return number.toString() + postDialDigits;
         } else {
-            return "";
+            return context.getResources().getString(R.string.unknown);
         }
     }