diff --git a/account-compression/Cargo.lock b/account-compression/Cargo.lock
index 4ad012b4ab3..b62f3b8d5e4 100644
--- a/account-compression/Cargo.lock
+++ b/account-compression/Cargo.lock
@@ -145,6 +145,7 @@ dependencies = [
  "anchor-derive-accounts",
  "anchor-derive-serde",
  "anchor-derive-space",
+ "anchor-syn",
  "arrayref",
  "base64 0.13.0",
  "bincode",
diff --git a/account-compression/programs/account-compression/Cargo.toml b/account-compression/programs/account-compression/Cargo.toml
index 6aac624cf76..f3398be4909 100644
--- a/account-compression/programs/account-compression/Cargo.toml
+++ b/account-compression/programs/account-compression/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "spl-account-compression"
-version = "0.4.0"
+version = "0.4.1"
 description = "Solana Program Library Account Compression Program"
 authors = ["Solana Labs Maintainers <maintainers@solanalabs.com>"]
 repository = "https://github.com/solana-labs/solana-program-library"
@@ -18,7 +18,7 @@ cpi = ["no-entrypoint"]
 default = []
 
 [dependencies]
-anchor-lang = "0.29.0"
+anchor-lang = { version = "0.29.0", features = ["idl-build"] }
 bytemuck = "1.13"
 solana-program = ">=1.18.11,<=2"
 spl-concurrent-merkle-tree = { version = "0.4.0", path = "../../../libraries/concurrent-merkle-tree" }
diff --git a/account-compression/programs/account-compression/src/state/concurrent_merkle_tree_header.rs b/account-compression/programs/account-compression/src/state/concurrent_merkle_tree_header.rs
index 29c0a38f71c..cbe2ce0161f 100644
--- a/account-compression/programs/account-compression/src/state/concurrent_merkle_tree_header.rs
+++ b/account-compression/programs/account-compression/src/state/concurrent_merkle_tree_header.rs
@@ -24,6 +24,8 @@ impl std::fmt::Display for CompressionAccountType {
     }
 }
 
+impl anchor_lang::IdlBuild for CompressionAccountType {}
+
 /// Initialization parameters for an SPL ConcurrentMerkleTree.
 ///
 /// Only the following permutations are valid: