diff --git a/src/com/android/dialer/CallDetailActivity.java b/src/com/android/dialer/CallDetailActivity.java
index 69242d3..5dae9d0 100644
--- a/src/com/android/dialer/CallDetailActivity.java
+++ b/src/com/android/dialer/CallDetailActivity.java
@@ -367,7 +367,8 @@
                 // We know that all calls are from the same number and the same contact, so pick the
                 // first.
                 PhoneCallDetails firstDetails = details[0];
-                mNumber = firstDetails.number.toString();
+                mNumber = TextUtils.isEmpty(firstDetails.number) ?
+                        null : firstDetails.number.toString();
                 final int numberPresentation = firstDetails.numberPresentation;
                 final Uri contactUri = firstDetails.contactUri;
                 final Uri photoUri = firstDetails.photoUri;
diff --git a/src/com/android/dialer/calllog/PhoneNumberDisplayHelper.java b/src/com/android/dialer/calllog/PhoneNumberDisplayHelper.java
index 0dffd86..c1a5abf 100644
--- a/src/com/android/dialer/calllog/PhoneNumberDisplayHelper.java
+++ b/src/com/android/dialer/calllog/PhoneNumberDisplayHelper.java
@@ -75,7 +75,6 @@
      */
     public CharSequence getDisplayNumber(PhoneAccountHandle accountHandle, CharSequence number,
             int presentation, CharSequence formattedNumber) {
-
         final CharSequence displayName = getDisplayName(accountHandle, number, presentation);
         if (!TextUtils.isEmpty(displayName)) {
             return displayName;