diff --git a/src/Wallabag/CoreBundle/Resources/views/themes/baggy/Entry/entries.html.twig b/src/Wallabag/CoreBundle/Resources/views/themes/baggy/Entry/entries.html.twig
index 6424df8d3..12cead487 100644
--- a/src/Wallabag/CoreBundle/Resources/views/themes/baggy/Entry/entries.html.twig
+++ b/src/Wallabag/CoreBundle/Resources/views/themes/baggy/Entry/entries.html.twig
@@ -86,7 +86,7 @@
 
     <!-- Export -->
     <aside id="download-form">
-    {% set currentTag = '' %}
+    {% set currentTag = null %}
     {% if tag is defined %}
         {% set currentTag = tag %}
     {% endif %}
diff --git a/src/Wallabag/CoreBundle/Resources/views/themes/material/Entry/entries.html.twig b/src/Wallabag/CoreBundle/Resources/views/themes/material/Entry/entries.html.twig
index 0c4dc80b6..9d6fb3f56 100644
--- a/src/Wallabag/CoreBundle/Resources/views/themes/material/Entry/entries.html.twig
+++ b/src/Wallabag/CoreBundle/Resources/views/themes/material/Entry/entries.html.twig
@@ -57,7 +57,7 @@
 
     <!-- Export -->
     <div id="export" class="side-nav right-aligned">
-    {% set currentTag = '' %}
+    {% set currentTag = null %}
     {% if tag is defined %}
         {% set currentTag = tag.slug %}
     {% endif %}