diff --git a/src/compiler/crystal/tools/doc/html/css/style.css b/src/compiler/crystal/tools/doc/html/css/style.css
index 69fb9c76b426..d93004300b74 100644
--- a/src/compiler/crystal/tools/doc/html/css/style.css
+++ b/src/compiler/crystal/tools/doc/html/css/style.css
@@ -1,4 +1,5 @@
 html, body {
+  background: #FFFFFF;
   position: relative;
   margin: 0;
   padding: 0;