diff --git a/frontend/less/espo/custom.less b/frontend/less/espo/custom.less
index 80b7670dbf..022a345e11 100644
--- a/frontend/less/espo/custom.less
+++ b/frontend/less/espo/custom.less
@@ -2165,7 +2165,7 @@ table.table td.cell .html-container {
     ol,
     pre,
     blockquote {
-        margin-top: @line-height-computed / 2;
+        margin-top: (@line-height-computed / 2);
     }
 
     p:last-child,