diff --git a/resources/skins.citizen.styles/common/toc.less b/resources/skins.citizen.styles/common/toc.less
index e4b6cdf4..163053b4 100644
--- a/resources/skins.citizen.styles/common/toc.less
+++ b/resources/skins.citizen.styles/common/toc.less
@@ -82,7 +82,7 @@
 		z-index: 2;
 		border-left: 1px dashed;
 		max-width: ~'calc( (100vw - '@page-width + @margin-side * 4~' ) / 2 )';
-		max-height: ~'calc( 100vh - '@header-height * 2 - @margin-side * 4~' )';
+		max-height: ~'calc( 100vh - '@header-height * 2 + @margin-side * 4~' )';
 		overflow: visible auto;
 		overscroll-behavior: contain;
 		display: block;