diff --git a/sass/_theme_layout.sass b/sass/_theme_layout.sass
index 2162143c..421fe5b9 100644
--- a/sass/_theme_layout.sass
+++ b/sass/_theme_layout.sass
@@ -1,3 +1,7 @@
+// Set uniform (but not relative) base font size
+html
+  font-size: $base-font-size
+
 .wy-affix
   position: fixed
   top: $gutter