1 files changed, 8 insertions, 0 deletions
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index 28dbd8ba7d3..09e7a42e944 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -704,6 +704,14 @@ fn opts() -> Vec<RustcOptGroup> {
             "removed, see issue #44136 <https://github.com/rust-lang/rust/issues/44136> for more information",
             "[rust]",
         ),
+        opt(
+            Unstable,
+            Flag,
+            "",
+            "generate-macro-expansion",
+            "Add possibility to expand macros in the HTML source code pages",
+            "",
+        ),
     ]
 }