diff --git a/curve25519-dalek/Cargo.toml b/curve25519-dalek/Cargo.toml
index 30868cf..9570670 100644
--- a/curve25519-dalek/Cargo.toml
+++ b/curve25519-dalek/Cargo.toml
@@ -62,6 +62,8 @@ engine25519-as = {git = "https://github.com/betrusted-io/engine25519-as.git", re
 utralib = {version = "0.1.24", default-features = false}
 zeroize = { version = "1", default-features = false }
 xous = "0.9.58"
+# for fallback when hardware is unavailable
+fiat-crypto = { version = "0.2.1", default-features = false}
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
 cpufeatures = "0.2.6"