diff --git a/Cargo.toml b/Cargo.toml
index 2b27b9e..6753c3f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,6 +36,6 @@ rustc-serialize = "0.3"
 
 [features]
 default = ["std"]
-std = ["rand"]
+std = ["rand", "curve25519-dalek/std"]
 bench = []
 nightly = ["curve25519-dalek/nightly"]