diff --git a/src/i18n/en.json b/src/i18n/en.json
index 9b60780e..b8ddc3d2 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -469,6 +469,7 @@
     "conversation_display_tree": "Tree-style",
     "conversation_display_simple_tree": "Simplified tree-style",
     "conversation_display_linear": "Linear-style",
+    "max_depth_in_thread": "Maximum number of levels in thread to display by default",
     "post_status_content_type": "Post status content type",
     "sensitive_by_default": "Mark posts as sensitive by default",
     "stop_gifs": "Pause animated images until you hover on them",