diff --git a/lms/static/sass/discussion/elements/_navigation.scss b/lms/static/sass/discussion/elements/_navigation.scss
index d170a10b0c..1b8e7b4fd1 100644
--- a/lms/static/sass/discussion/elements/_navigation.scss
+++ b/lms/static/sass/discussion/elements/_navigation.scss
@@ -199,7 +199,7 @@
         text-overflow: ellipsis;
 
         @include rtl {
-            // This is counterintuitive, but when showing a preview of the first part of LTR text, using direction: rtl
+            // This is counterintuitive, but when showing a preview of the first part of RTL text, using direction: rtl
             // will actually show the _last_ part of that text.
             direction: ltr;
         }