diff --git a/build.rs b/build.rs
index 4dc18a6..1cc8b3b 100644
--- a/build.rs
+++ b/build.rs
@@ -84,7 +84,6 @@
 }
 
 struct RustcVersion {
-    minor: u32,
     nightly: bool,
 }
 
@@ -102,15 +101,8 @@
     let output = otry!(Command::new(rustc).arg("--version").output().ok());
     let version = otry!(str::from_utf8(&output.stdout).ok());
     let nightly = version.contains("nightly");
-    let mut pieces = version.split('.');
-    if pieces.next() != Some("rustc 1") {
-        return None;
-    }
-    let minor = otry!(pieces.next());
-    let minor = otry!(minor.parse().ok());
 
     Some(RustcVersion {
-        minor: minor,
         nightly: nightly,
     })
 }