diff --git a/src/css/style.css b/src/css/style.css
index f4ac5c4af..e0b7a23b0 100644
--- a/src/css/style.css
+++ b/src/css/style.css
@@ -818,6 +818,9 @@ div.catalog-thread {
   max-width: 100%;
   box-sizing: border-box;
 }
+.catalog-thread .MathJax_Display {
+  text-align: center !important;
+}
 .catalog-thread table.exif {
   border-collapse: collapse;
 }