diff --git a/cranelift/src/cton-util.rs b/cranelift/src/cton-util.rs
index 3d9b979e2f..bd104e9d5f 100644
--- a/cranelift/src/cton-util.rs
+++ b/cranelift/src/cton-util.rs
@@ -96,7 +96,7 @@ fn main() {
         if !msg.ends_with('\n') {
             msg.push('\n');
         }
-        io::stderr().write(msg.as_bytes()).unwrap();
+        io::stderr().write_all(msg.as_bytes()).unwrap();
         process::exit(1);
     }
 }