diff --git a/.github/workflows/cbindgen.yml b/.github/workflows/cbindgen.yml
new file mode 100644
index 0000000..ba83248
--- /dev/null
+++ b/.github/workflows/cbindgen.yml
@@ -0,0 +1,17 @@
+name: cbindgen
+on: [push, pull_request]
+
+jobs:
+  header_check:
+    runs-on: ubuntu-latest
+    name: Check cbindgen
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.4"
+          bundler-cache: true
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - run: cargo install --force cbindgen
+      - run: bundle exec rake cbindgen
+      - run: git diff --no-ext-diff --ignore-submodules --exit-code
diff --git a/Rakefile b/Rakefile
index 6135499..5fd8139 100644
--- a/Rakefile
+++ b/Rakefile
@@ -39,6 +39,12 @@ namespace :install do
   task(release: :"compile:release", &install_task)
 end
 
+task :cbindgen do
+  Dir.chdir("gc/mmtk") do
+    sh("cbindgen --config cbindgen.toml --output mmtk.h")
+  end
+end
+
 RUBY_HEADERS = %w[
   ccan/check_type/check_type.h ccan/container_of/container_of.h ccan/list/list.h ccan/str/str.h
   gc/gc_impl.h gc/gc.h gc/extconf_base.rb
diff --git a/gc/mmtk/mmtk.h b/gc/mmtk/mmtk.h
index 872c273..02927f5 100644
--- a/gc/mmtk/mmtk.h
+++ b/gc/mmtk/mmtk.h
@@ -149,4 +149,4 @@ size_t mmtk_worker_count(void);
 
 bool mmtk_is_mmtk_object(MMTk_Address addr);
 
-#endif /* MMTK_H */
+#endif  /* MMTK_H */