diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs
index e8d323b9af1..50d160ccd82 100644
--- a/src/librustdoc/html/render/context.rs
+++ b/src/librustdoc/html/render/context.rs
@@ -70,6 +70,10 @@ crate struct Context<'tcx> {
pub(super) cache: Rc,
}
+// `Context` is cloned a lot, so we don't want the size to grow unexpectedly.
+#[cfg(target_arch = "x86_64")]
+rustc_data_structures::static_assert_size!(Context<'_>, 72);
+
impl<'tcx> Context<'tcx> {
pub(super) fn path(&self, filename: &str) -> PathBuf {
// We use splitn vs Path::extension here because we might get a filename