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-rw-r--r--src/librustc_metadata/index.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc_metadata/index.rs b/src/librustc_metadata/index.rs
index 970a401177b..ebf9910e9c9 100644
--- a/src/librustc_metadata/index.rs
+++ b/src/librustc_metadata/index.rs
@@ -58,7 +58,7 @@ impl Index {
         let pos = buf.position();
 
         // First we write the length of the lower range ...
-        buf.write_all(words_to_bytes(&[self.positions[0].len() as u32])).unwrap();
+        buf.write_all(words_to_bytes(&[(self.positions[0].len() as u32).to_le()])).unwrap();
         // ... then the values in the lower range ...
         buf.write_all(words_to_bytes(&self.positions[0][..])).unwrap();
         // ... then the values in the higher range.