diff --git a/InCallUI/src/com/android/incallui/CallCardPresenter.java b/InCallUI/src/com/android/incallui/CallCardPresenter.java
index eb46403..5ba67ff 100644
--- a/InCallUI/src/com/android/incallui/CallCardPresenter.java
+++ b/InCallUI/src/com/android/incallui/CallCardPresenter.java
@@ -210,9 +210,11 @@
     public void onDetailsChanged(android.telecomm.Call.Details details) {
         getUi().setCallDetails(details);
 
-        String currentNumber = mPrimary.getHandle().getSchemeSpecificPart();
-        if (PhoneNumberUtils.isEmergencyNumber(currentNumber)) {
-            setEmergencyNumberIfSet(details);
+        if (mPrimary != null) {
+            String currentNumber = mPrimary.getHandle().getSchemeSpecificPart();
+            if (PhoneNumberUtils.isEmergencyNumber(currentNumber)) {
+                setEmergencyNumberIfSet(details);
+            }
         }
     }