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-rw-r--r--src/librustdoc/html/markdown.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
index dfad1ab10db..dbd78ea0dc9 100644
--- a/src/librustdoc/html/markdown.rs
+++ b/src/librustdoc/html/markdown.rs
@@ -2013,6 +2013,7 @@ fn init_id_map() -> FxHashMap<Cow<'static, str>, usize> {
     map.insert("themeStyle".into(), 1);
     map.insert("settings-menu".into(), 1);
     map.insert("help-button".into(), 1);
+    map.insert("sidebar-button".into(), 1);
     map.insert("main-content".into(), 1);
     map.insert("toggle-all-docs".into(), 1);
     map.insert("all-types".into(), 1);