diff --git a/milli/src/heed_codec/mod.rs b/milli/src/heed_codec/mod.rs
index e7b8cf256..ff8285357 100644
--- a/milli/src/heed_codec/mod.rs
+++ b/milli/src/heed_codec/mod.rs
@@ -1,14 +1,10 @@
 mod beu32_str_codec;
-mod bo_roaring_bitmap_codec;
-mod cbo_roaring_bitmap_codec;
 mod obkv_codec;
-mod roaring_bitmap_codec;
+mod roaring_bitmap;
 mod str_str_u8_codec;
 pub mod facet;
 
 pub use self::beu32_str_codec::BEU32StrCodec;
-pub use self::bo_roaring_bitmap_codec::BoRoaringBitmapCodec;
-pub use self::cbo_roaring_bitmap_codec::CboRoaringBitmapCodec;
 pub use self::obkv_codec::ObkvCodec;
-pub use self::roaring_bitmap_codec::RoaringBitmapCodec;
+pub use self::roaring_bitmap::{BoRoaringBitmapCodec, CboRoaringBitmapCodec, RoaringBitmapCodec};
 pub use self::str_str_u8_codec::StrStrU8Codec;
diff --git a/milli/src/heed_codec/bo_roaring_bitmap_codec.rs b/milli/src/heed_codec/roaring_bitmap/bo_roaring_bitmap_codec.rs
similarity index 100%
rename from milli/src/heed_codec/bo_roaring_bitmap_codec.rs
rename to milli/src/heed_codec/roaring_bitmap/bo_roaring_bitmap_codec.rs
diff --git a/milli/src/heed_codec/cbo_roaring_bitmap_codec.rs b/milli/src/heed_codec/roaring_bitmap/cbo_roaring_bitmap_codec.rs
similarity index 100%
rename from milli/src/heed_codec/cbo_roaring_bitmap_codec.rs
rename to milli/src/heed_codec/roaring_bitmap/cbo_roaring_bitmap_codec.rs
diff --git a/milli/src/heed_codec/roaring_bitmap/mod.rs b/milli/src/heed_codec/roaring_bitmap/mod.rs
new file mode 100644
index 000000000..866567637
--- /dev/null
+++ b/milli/src/heed_codec/roaring_bitmap/mod.rs
@@ -0,0 +1,7 @@
+mod bo_roaring_bitmap_codec;
+mod cbo_roaring_bitmap_codec;
+mod roaring_bitmap_codec;
+
+pub use self::bo_roaring_bitmap_codec::BoRoaringBitmapCodec;
+pub use self::cbo_roaring_bitmap_codec::CboRoaringBitmapCodec;
+pub use self::roaring_bitmap_codec::RoaringBitmapCodec;
diff --git a/milli/src/heed_codec/roaring_bitmap_codec.rs b/milli/src/heed_codec/roaring_bitmap/roaring_bitmap_codec.rs
similarity index 100%
rename from milli/src/heed_codec/roaring_bitmap_codec.rs
rename to milli/src/heed_codec/roaring_bitmap/roaring_bitmap_codec.rs