diff --git a/Cargo.toml b/Cargo.toml
index 1686125..1be9a6a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ version = "0.3.0"
 alloc = []
 danger = []
 default = ["ristretto255-ciphersuite", "ristretto255-u64", "serde"]
-ristretto255 = ["generic-array/more_lengths"]
+ristretto255 = ["curve25519-dalek", "generic-array/more_lengths"]
 ristretto255-ciphersuite = ["ristretto255", "sha2"]
 ristretto255-fiat-u32 = ["curve25519-dalek/fiat_u32_backend", "ristretto255"]
 ristretto255-fiat-u64 = ["curve25519-dalek/fiat_u64_backend", "ristretto255"]