diff --git a/tildes/scss/_base.scss b/tildes/scss/_base.scss
index 44c90e2..a8e6a3a 100644
--- a/tildes/scss/_base.scss
+++ b/tildes/scss/_base.scss
@@ -38,6 +38,8 @@ body {
 code {
   display: inline-block;
   line-height: 1rem;
+  -moz-tab-size: 4;
+  tab-size: 4;
 }
 
 // Fixes a Chrome bug that seems to treat children of <details> as having