diff --git a/themes/grav/templates/partials/nav-user-avatar.html.twig b/themes/grav/templates/partials/nav-user-avatar.html.twig
index 27c61dce..245d4c13 100644
--- a/themes/grav/templates/partials/nav-user-avatar.html.twig
+++ b/themes/grav/templates/partials/nav-user-avatar.html.twig
@@ -1,2 +1,2 @@
 {% set user_avatar = admin.user.getAvatarUrl() %}
-<img src="{{ '?' not in user_avatar ? user_avatar ~ '?s=80' : user_avatar }}" />
+<img src="{{ ('?' not in user_avatar) and (not user_avatar starts with 'data:') ? user_avatar ~ '?s=80' : user_avatar }}" />