diff --git a/packages/core/src/vivliostyle/assets.ts b/packages/core/src/vivliostyle/assets.ts
index be4c6073c..ea2cff384 100644
--- a/packages/core/src/vivliostyle/assets.ts
+++ b/packages/core/src/vivliostyle/assets.ts
@@ -1503,6 +1503,7 @@ viv-ts-thin-sp::after {
   letter-spacing: -0.125em;
   line-height: 0;
   text-orientation: mixed;
+  visibility: hidden;
 }
 
 span[data-viv-leader] {