diff --git a/Form/Type/PhoneNumberType.php b/Form/Type/PhoneNumberType.php
index 58b67bf..9c31add 100644
--- a/Form/Type/PhoneNumberType.php
+++ b/Form/Type/PhoneNumberType.php
@@ -183,6 +183,6 @@ class PhoneNumberType extends AbstractType
      */
     public function getBlockPrefix()
     {
-        return 'tel';
+        return 'misd_tel';
     }
 }
diff --git a/Resources/views/Form/tel.html.twig b/Resources/views/Form/tel.html.twig
index 1fdfed4..c8064e4 100644
--- a/Resources/views/Form/tel.html.twig
+++ b/Resources/views/Form/tel.html.twig
@@ -1,4 +1,4 @@
-{% block tel_widget -%}
+{% block misd_tel_widget -%}
     {% if widget is constant('Misd\\PhoneNumberBundle\\Form\\Type\\PhoneNumberType::WIDGET_COUNTRY_CHOICE') %}
         <div {{ block('widget_container_attributes') }}>
             {{- form_widget(form.country) -}}
diff --git a/Resources/views/Form/tel_bootstrap.html.twig b/Resources/views/Form/tel_bootstrap.html.twig
index 79f4748..7772df9 100644
--- a/Resources/views/Form/tel_bootstrap.html.twig
+++ b/Resources/views/Form/tel_bootstrap.html.twig
@@ -1,4 +1,4 @@
-{% block tel_widget -%}
+{% block misd_tel_widget -%}
     {% if widget is constant('Misd\\PhoneNumberBundle\\Form\\Type\\PhoneNumberType::WIDGET_COUNTRY_CHOICE') %}
         {% set attr = attr|merge({class: (attr.class|default('') ~ ' form-inline')|trim}) %}
         <div {{ block('widget_container_attributes') }}>