diff --git a/Cargo.toml b/Cargo.toml
index 94d9f96..78591d1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -62,4 +62,6 @@ asm = ["sha2/asm"]
 legacy_compatibility = []
 u64_backend = ["curve25519-dalek/u64_backend"]
 u32_backend = ["curve25519-dalek/u32_backend"]
+fiat_u64_backend = ["curve25519-dalek/fiat_u64_backend"]
+fiat_u32_backend = ["curve25519-dalek/fiat_u32_backend"]
 simd_backend = ["curve25519-dalek/simd_backend"]