diff --git a/core/modules/forum/forum-rtl.css b/core/modules/forum/forum-rtl.css
index a0bdf2d..3f2a88b 100644
--- a/core/modules/forum/forum-rtl.css
+++ b/core/modules/forum/forum-rtl.css
@@ -8,6 +8,7 @@
   margin: 0 0 0 9px;
 }
 #forum div.indent {
+  margin-left: 0;
   margin-right: 20px;
 }
 .forum-topic-navigation {
diff --git a/core/modules/forum/forum.css b/core/modules/forum/forum.css
index 255a46b..5ac5e75 100644
--- a/core/modules/forum/forum.css
+++ b/core/modules/forum/forum.css
@@ -27,7 +27,7 @@
   overflow: hidden;
 }
 #forum div.indent {
-  margin-left: 20px;
+  margin-left: 20px; /* LTR */
 }
 
 #forum .topic-status-new {