diff --git a/mla/CHANGELOG.md b/mla/CHANGELOG.md
index 1e09841..0fc440e 100644
--- a/mla/CHANGELOG.md
+++ b/mla/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added/Changed
 
 - Introduce `"send"` feature, to provide `ArchiveWriter` with `Send` bound ([#120](https://github.com/ANSSI-FR/MLA/issues/120))
+- Enable `x25519-dalek`'s `"u64_backend"` feature by default, to have a default working compilation
 - Bump dependencies
 - Dependencies: disable default features
 - Code cleaning
diff --git a/mla/Cargo.toml b/mla/Cargo.toml
index 173cee9..48c723a 100644
--- a/mla/Cargo.toml
+++ b/mla/Cargo.toml
@@ -43,6 +43,9 @@ hex = { version = "0.4", default-features = false, features = ["alloc"]}
 static_assertions = { version = "1", default-features = false }
 
 [features]
+# x25519-dalek depends on curve25519-dalek, which requires at least one feature to be enabled
+# -> use default u64_backend (x25519-dalek's default) to have a working default compilation
+default = ["x25519-dalek/u64_backend"]
 send = []
 
 [[bench]]