diff --git a/src/header/bits_timer-t/cbindgen.toml b/src/header/bits_timer-t/cbindgen.toml
new file mode 100644
index 0000000000..33f6a4ccd1
--- /dev/null
+++ b/src/header/bits_timer-t/cbindgen.toml
@@ -0,0 +1,17 @@
+# POSIX header spec: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_types.h.html
+#
+# This type is split out to prevent importing all of sys/types.h into other headers.
+#
+# POSIX headers that require timer_t:
+# - sys/types.h (where it should be defined)
+# - time.h
+sys_includes = []
+include_guard = "_RELIBC_BITS_TIMER_T_H"
+language = "C"
+style = "type"
+no_includes = true
+cpp_compat = true
+[export]
+include = ["timer_t"]
+[enum]
+prefix_with_name = true
diff --git a/src/header/bits_timer-t/mod.rs b/src/header/bits_timer-t/mod.rs
new file mode 100644
index 0000000000..84324346e1
--- /dev/null
+++ b/src/header/bits_timer-t/mod.rs
@@ -0,0 +1,5 @@
+use crate::platform::types::c_void;
+
+/// Used for timer ID returned by timer_create()
+#[allow(non_camel_case_types)]
+pub type timer_t = *mut c_void;
diff --git a/src/header/mod.rs b/src/header/mod.rs
index 5c58b3a09b..e85a4dc560 100644
--- a/src/header/mod.rs
+++ b/src/header/mod.rs
@@ -40,6 +40,8 @@ pub mod bits_suseconds_t;
 pub mod bits_sys_statvfs;
 #[path = "bits_time-t/mod.rs"]
 pub mod bits_time_t;
+#[path = "bits_timer-t/mod.rs"]
+pub mod bits_timer_t;
 pub mod bits_timespec;
 pub mod bits_timeval;
 #[path = "bits_uid-t/mod.rs"]
diff --git a/src/header/sys_types_internal/cbindgen.toml b/src/header/sys_types_internal/cbindgen.toml
index a79f81b163..21a4a58751 100644
--- a/src/header/sys_types_internal/cbindgen.toml
+++ b/src/header/sys_types_internal/cbindgen.toml
@@ -1,6 +1,5 @@
 # stddef.h brings in size_t
 sys_includes = ["stddef.h"]
-# TODO: figure out how to export void* type
 after_includes = """
 #include <bits/clock-t.h>
 #include <bits/clockid-t.h>
@@ -14,9 +13,8 @@ after_includes = """
 #include <bits/suseconds-t.h>
 #include <bits/sys/statvfs.h> // for fsblkcnt_t and fsfilcnt_t
 #include <bits/time-t.h>
+#include <bits/timer-t.h>
 #include <bits/uid-t.h>
-
-typedef void* timer_t;
 """
 include_guard = "_RELIBC_SYS_TYPES_INTERNAL_H"
 language = "C"
diff --git a/src/header/sys_types_internal/mod.rs b/src/header/sys_types_internal/mod.rs
index aa499b3c72..3c0cc9cd45 100644
--- a/src/header/sys_types_internal/mod.rs
+++ b/src/header/sys_types_internal/mod.rs
@@ -20,6 +20,7 @@ pub use crate::header::{
     bits_suseconds_t::suseconds_t,
     bits_sys_statvfs::{fsblkcnt_t, fsfilcnt_t},
     bits_time_t::time_t,
+    bits_timer_t::timer_t,
     bits_uid_t::uid_t,
 };
 use crate::platform::types::{
@@ -36,8 +37,6 @@ pub type reclen_t = c_ushort;
 pub type nlink_t = c_ulong;
 pub type useconds_t = c_uint;
 
-// timer_t in cbindgen after_includes (how to export void* type?)
-
 /// Used for file block counts.
 pub type blkcnt_t = c_longlong;