diff --git a/sphinx_rtd_theme/layout.html b/sphinx_rtd_theme/layout.html
index f3de11ad0..2778a1922 100644
--- a/sphinx_rtd_theme/layout.html
+++ b/sphinx_rtd_theme/layout.html
@@ -29,11 +29,19 @@
{%- endif %}
{%- for css in css_files %}
- {{ css_tag(css) }}
+ {% if css|attr("filename") -%}
+ {{ css_tag(css) }}
+ {%- else -%}
+
+ {%- endif %}
{%- endfor %}
{%- for cssfile in extra_css_files %}
- {{ css_tag(cssfile) }}
+ {% if css|attr("filename") -%}
+ {{ css_tag(css) }}
+ {%- else -%}
+
+ {%- endif %}
{%- endfor -%}
{#- FAVICON