diff --git a/src/liballoc_system/lib.rs b/src/liballoc_system/lib.rs
index a0c0d7d0e94..7f2d362e5d9 100644
--- a/src/liballoc_system/lib.rs
+++ b/src/liballoc_system/lib.rs
@@ -29,13 +29,13 @@
 // The minimum alignment guaranteed by the architecture. This value is used to
 // add fast paths for low alignment values. In practice, the alignment is a
 // constant at the call site and the branch will be optimized out.
-#[cfg(all(any(target_arch = "arm",
+#[cfg(all(any(target_arch = "x86",
+              target_arch = "arm",
               target_arch = "mips",
               target_arch = "mipsel",
               target_arch = "powerpc")))]
 const MIN_ALIGN: usize = 8;
-#[cfg(all(any(target_arch = "x86",
-              target_arch = "x86_64",
+#[cfg(all(any(target_arch = "x86_64",
               target_arch = "aarch64")))]
 const MIN_ALIGN: usize = 16;