diff --git a/theme/mathform.css b/theme/mathform.css
index 0cb137661..b5cff9a7f 100644
--- a/theme/mathform.css
+++ b/theme/mathform.css
@@ -7,7 +7,7 @@
     flex-wrap: nowrap;
 
 	& .ck.ck-math-preview {
-		// Todo: calculate content size
+		/* Todo: calculate content size */
 		width: 234px;
 		height: 10em;
 	}