diff --git a/src/lang_items.rs b/src/lang_items.rs
index 236b2bd3..9ff95b59 100644
--- a/src/lang_items.rs
+++ b/src/lang_items.rs
@@ -5,6 +5,7 @@ unsafe extern "C" fn panic_fmt(
     _: ::core::fmt::Arguments,
     _: &'static str,
     _: u32,
+    _: u32,
 ) -> ! {
     ::core::intrinsics::abort()
 }