diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index c6bc72913..f675ee7b5 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -53,8 +53,4 @@ test-case = "2.2.2"
 testutils = { path = "testutils" }
 
 [features]
-default = ["legacy_protobuf"]
 vendored-openssl = ["git2/vendored-openssl"]
-# Enable upgrade of repositories created with storage backends based on
-# Protobuf format (from before we switched to Thrift)
-legacy_protobuf = []
diff --git a/lib/src/lib.rs b/lib/src/lib.rs
index 9e33a1408..4e72926b2 100644
--- a/lib/src/lib.rs
+++ b/lib/src/lib.rs
@@ -37,7 +37,6 @@ pub mod nightly_shims;
 pub mod op_heads_store;
 pub mod op_store;
 pub mod operation;
-#[cfg(feature = "legacy_protobuf")]
 mod proto_op_store;
 pub mod protos;
 pub mod refs;
diff --git a/lib/src/simple_op_store.rs b/lib/src/simple_op_store.rs
index 84cf86186..8f5d1c46b 100644
--- a/lib/src/simple_op_store.rs
+++ b/lib/src/simple_op_store.rs
@@ -31,7 +31,6 @@ use crate::op_store::{
     BranchTarget, OpStore, OpStoreError, OpStoreResult, Operation, OperationId, OperationMetadata,
     RefTarget, View, ViewId, WorkspaceId,
 };
-#[cfg(feature = "legacy_protobuf")]
 use crate::proto_op_store::ProtoOpStore;
 use crate::simple_op_store_model;
 
@@ -60,7 +59,6 @@ pub struct SimpleOpStore {
     delegate: ThriftOpStore,
 }
 
-#[cfg(feature = "legacy_protobuf")]
 fn upgrade_to_thrift(store_path: PathBuf) -> std::io::Result<()> {
     println!("Upgrading operation log to Thrift format...");
     let proto_store = ProtoOpStore::load(store_path.clone());
@@ -170,13 +168,11 @@ fn upgrade_to_thrift(store_path: PathBuf) -> std::io::Result<()> {
 
 impl SimpleOpStore {
     pub fn init(store_path: PathBuf) -> Self {
-        #[cfg(feature = "legacy_protobuf")]
         fs::write(store_path.join("thrift_store"), "").unwrap();
         let delegate = ThriftOpStore::init(store_path);
         SimpleOpStore { delegate }
     }
 
-    #[cfg(feature = "legacy_protobuf")]
     pub fn load(store_path: PathBuf) -> Self {
         if !store_path.join("thrift_store").exists() {
             upgrade_to_thrift(store_path.clone())
@@ -185,12 +181,6 @@ impl SimpleOpStore {
         let delegate = ThriftOpStore::load(store_path);
         SimpleOpStore { delegate }
     }
-
-    #[cfg(not(feature = "legacy_protobuf"))]
-    pub fn load(store_path: PathBuf) -> Self {
-        let delegate = ThriftOpStore::load(store_path);
-        SimpleOpStore { delegate }
-    }
 }
 
 fn not_found_to_store_error(err: std::io::Error) -> OpStoreError {