diff --git a/java/com/android/dialer/assisteddialing/ui/AssistedDialingSettingFragment.java b/java/com/android/dialer/assisteddialing/ui/AssistedDialingSettingFragment.java
index 932cc6d..f1ea4c9 100644
--- a/java/com/android/dialer/assisteddialing/ui/AssistedDialingSettingFragment.java
+++ b/java/com/android/dialer/assisteddialing/ui/AssistedDialingSettingFragment.java
@@ -140,6 +140,28 @@
 
     countryChooserPref.setEntries(newKeys.toArray(new CharSequence[newKeys.size()]));
     countryChooserPref.setEntryValues(newValues.toArray(new CharSequence[newValues.size()]));
+
+    if (!newValues.contains(countryChooserPref.getValue())) {
+      ameliorateInvalidSelectedValue(countryChooserPref);
+    }
+  }
+
+  /**
+   * Restore an invalid user selected value to the default value.
+   *
+   * <p>In the Assisted Dialing settings in Dialer, this state is possible when a user selected a
+   * country code, and then that country code was removed from our filtered list, typically via a
+   * change in the available countries provided by a server side flag.
+   *
+   * @param countryChooserPref The list preference to restore to default when an invalid value is
+   *     detected.
+   */
+  private void ameliorateInvalidSelectedValue(ListPreference countryChooserPref) {
+    // Reset the preference value to the default value.
+    countryChooserPref.setValue(countryChooserPref.getEntryValues()[0].toString());
+    LogUtil.i(
+        "AssistedDialingSettingFragment.ameliorateInvalidSelectedValue",
+        "Reset the country chooser preference to the default value.");
   }
 
   private List<DisplayNameAndCountryCodeTuple> buildDefaultCountryChooserKeysAndValues(