diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 45bea8a..9c6adb3 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -1633,6 +1633,7 @@
 
     @Override
     public void setCellInfoListRate(int rateInMillis) {
+        enforceModifyPermission();
         mPhone.setCellInfoListRate(rateInMillis);
     }