1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index c1e6d324d5a..4fe5e13c3af 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -147,7 +147,7 @@ pub fn main() {
 
         #[cfg(target_os = "macos")]
         {
-            extern "C" {
+            unsafe extern "C" {
                 fn _rjem_je_zone_register();
             }