diff --git a/theme/base/style/dock.css b/theme/base/style/dock.css
index 6c77f771ac3..dc1b8c348da 100644
--- a/theme/base/style/dock.css
+++ b/theme/base/style/dock.css
@@ -51,4 +51,3 @@ body.dir-rtl.has_dock  {margin-left: 0px; margin-right: 30px}
 #dock .moodle-core-dragdrop-draghandle {
     display: none;
 }
-
diff --git a/theme/bootstrapbase/less/moodle/dock.less b/theme/bootstrapbase/less/moodle/dock.less
index 8437324f51d..ceb28aa3542 100644
--- a/theme/bootstrapbase/less/moodle/dock.less
+++ b/theme/bootstrapbase/less/moodle/dock.less
@@ -68,6 +68,7 @@ body.has_dock {
         }
     }
 
+    // Hide the move icon for blocks which are docked.
     .editing_move,
     .moodle-core-dragdrop-draghandle {
         display: none;