diff --git a/Cargo.toml b/Cargo.toml
index ae913d41..d353ff33 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,3 +40,4 @@ default = ["mongo-tokio-sync"]
 mongo-std-sync = ["mongodb/sync"]
 mongo-tokio-sync = ["mongodb/tokio-sync"]
 cuda = ["halo2_proofs/cuda"]
+asm = ["halo2_proofs/asm"]