diff --git a/Cargo.lock b/Cargo.lock
index d6f04af9a..b3b23f02d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1227,7 +1227,7 @@ checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 [[package]]
 name = "oxidized-mtbl"
 version = "0.1.0"
-source = "git+https://github.com/Kerollmops/oxidized-mtbl.git?rev=5426182#5426182d9ad8b74a9ebb386f03d33ce073cef0e0"
+source = "git+https://github.com/Kerollmops/oxidized-mtbl.git?rev=9bf47a7#9bf47a7d4f17dd45d395f12874291e00b2eadf40"
 dependencies = [
  "byteorder",
  "crc32c",
diff --git a/Cargo.toml b/Cargo.toml
index 89e87599b..dbf77d00b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ levenshtein_automata = { version = "0.2.0", features = ["fst_automaton"] }
 memmap = "0.7.0"
 near-proximity = { git = "https://github.com/Kerollmops/plane-sweep-proximity", rev = "6608205" }
 once_cell = "1.4.0"
-oxidized-mtbl = { git = "https://github.com/Kerollmops/oxidized-mtbl.git", rev = "5426182" }
+oxidized-mtbl = { git = "https://github.com/Kerollmops/oxidized-mtbl.git", rev = "9bf47a7" }
 rayon = "1.3.1"
 ringtail = "0.3.0"
 roaring = "0.6.0"
diff --git a/src/bin/indexer.rs b/src/bin/indexer.rs
index ae67abd99..e2f6c012c 100644
--- a/src/bin/indexer.rs
+++ b/src/bin/indexer.rs
@@ -34,9 +34,10 @@ const MAX_ATTRIBUTES: usize = u32::max_value() as usize / MAX_POSITION;
 const HEADERS_KEY: &[u8] = b"\0headers";
 const DOCUMENTS_IDS_KEY: &[u8] = b"\x04documents-ids";
 const WORDS_FST_KEY: &[u8] = b"\x06words-fst";
-const DOCUMENTS_IDS_BYTE: u8 = 4;
-const WORD_DOCIDS_BYTE: u8 = 2;
+const HEADERS_BYTE: u8 = 0;
 const WORD_DOCID_POSITIONS_BYTE: u8 = 1;
+const WORD_DOCIDS_BYTE: u8 = 2;
+const DOCUMENTS_IDS_BYTE: u8 = 4;
 
 #[cfg(target_os = "linux")]
 #[global_allocator]
@@ -302,12 +303,8 @@ fn merge(key: &[u8], values: &[Vec<u8>]) -> Result<Vec<u8>, ()> {
             build.extend_stream(op.into_stream()).unwrap();
             Ok(build.into_inner().unwrap())
         },
-        HEADERS_KEY => {
-            assert!(values.windows(2).all(|vs| vs[0] == vs[1]));
-            Ok(values[0].to_vec())
-        },
         key => match key[0] {
-            WORD_DOCID_POSITIONS_BYTE => {
+            HEADERS_BYTE | WORD_DOCID_POSITIONS_BYTE => {
                 assert!(values.windows(2).all(|vs| vs[0] == vs[1]));
                 Ok(values[0].to_vec())
             },