diff --git a/ext/crates/fp/Cargo.toml b/ext/crates/fp/Cargo.toml
index 30cb2209c..dc61e8939 100644
--- a/ext/crates/fp/Cargo.toml
+++ b/ext/crates/fp/Cargo.toml
@@ -28,9 +28,13 @@ build_const = "0.2.2"
 
 [features]
 default = ["odd-primes"]
+
 concurrent = ["rayon"]
 json = ["serde_json", "serde"]
+
+large-primes = ["odd-primes"]
 odd-primes = []
+prime-powers = []
 
 [[bench]]
 name = "criterion"