diff --git a/src/header/bits_eventfd/cbindgen.toml b/src/header/bits_eventfd/cbindgen.toml
new file mode 100644
index 0000000000..5af1a4a98c
--- /dev/null
+++ b/src/header/bits_eventfd/cbindgen.toml
@@ -0,0 +1,14 @@
+# `bits/eventfd.h` — eventfd counter type
+#
+# Type alias for the 64-bit eventfd counter.
+# Used by sys/eventfd.h for read/write operations.
+include_guard = "_RELIBC_BITS_EVENTFD_H"
+language = "C"
+no_includes = true
+cpp_compat = true
+
+[export]
+include = ["eventfd_t"]
+
+[export.rename]
+"eventfd_t" = "eventfd_t"