diff --git a/src/librustc_target/abi/mod.rs b/src/librustc_target/abi/mod.rs
index 681326b0f150..afa30e7e632a 100644
--- a/src/librustc_target/abi/mod.rs
+++ b/src/librustc_target/abi/mod.rs
@@ -661,10 +661,9 @@ impl FieldPlacement {
     pub fn offset(&self, i: usize) -> Size {
         match *self {
             FieldPlacement::Union(count) => {
-                assert!(i < count,
-                        "Tried to access field {} of union with {} fields", i, count);
+                assert!(i < count, "tried to access field {} of union with {} fields", i, count);
                 Size::ZERO
-            },
+            }
             FieldPlacement::Array { stride, count } => {
                 let i = i as u64;
                 assert!(i < count);