diff --git a/src/librustc_driver/driver.rs b/src/librustc_driver/driver.rs
index 84b1ade6d8b..51121669aef 100644
--- a/src/librustc_driver/driver.rs
+++ b/src/librustc_driver/driver.rs
@@ -246,8 +246,7 @@ macro_rules! controller_entry_point {
         })??
     };
 
-    #[cfg(not(feature="llvm"))]
-    {
+    if cfg!(not(feature="llvm")) {
         let (_, _) = (outputs, trans);
         sess.fatal("LLVM is not supported by this rustc");
     }