diff --git a/.github/workflows/build-check.yml b/.github/workflows/build-check.yml
new file mode 100644
index 00000000..4d554abd
--- /dev/null
+++ b/.github/workflows/build-check.yml
@@ -0,0 +1,36 @@
+name: build-check
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+concurrency:
+  group: build-check-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
+jobs:
+  cargo-build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - uses: dtolnay/rust-toolchain@stable
+
+      - name: Install protoc
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y protobuf-compiler
+
+      # The cdylib `statsig_ffi` is what figma-release.yml ships. Building it
+      # transitively builds statsig-rust. Compile errors in either crate fail
+      # the PR before merge — catches things like the missing-field bug we
+      # hit in PR #7 (added a field to StatsigOptions but missed an
+      # exhaustive struct literal in statsig-ffi).
+      - name: cargo build --release -p statsig_ffi
+        env:
+          STATSIG_BUILD_PROTO: true
+        run: cargo build --release -p statsig_ffi
diff --git a/statsig-ffi/src/statsig_options_c.rs b/statsig-ffi/src/statsig_options_c.rs
index 07e36877..dc19f725 100644
--- a/statsig-ffi/src/statsig_options_c.rs
+++ b/statsig-ffi/src/statsig_options_c.rs
@@ -153,6 +153,7 @@ impl From<StatsigOptionsData> for StatsigOptions {
             event_logging_flush_interval_ms: None, // Deprecated
             event_logging_max_pending_batch_queue_size,
             event_logging_max_queue_size: data.event_logging_max_queue_size,
+            exposure_dedupe_max_keys: None,
             fallback_to_statsig_api: data.fallback_to_statsig_api,
             global_custom_fields: data.global_custom_fields,
             id_lists_adapter: None, // todo: add support for id lists adapter
diff --git a/statsig-pyo3/src/statsig_options_py.rs b/statsig-pyo3/src/statsig_options_py.rs
index 86e6b946..92759c6f 100644
--- a/statsig-pyo3/src/statsig_options_py.rs
+++ b/statsig-pyo3/src/statsig_options_py.rs
@@ -357,6 +357,7 @@ fn create_inner_statsig_options(
         event_logging_flush_interval_ms: None,
         event_logging_max_queue_size: opts.event_logging_max_queue_size,
         event_logging_max_pending_batch_queue_size: opts.event_logging_max_pending_batch_queue_size,
+        exposure_dedupe_max_keys: None,
         enable_id_lists: opts.enable_id_lists,
         enable_dcs_deltas: opts.enable_dcs_deltas,
         id_lists_url: opts.id_lists_url.clone(),