diff --git a/src/header/bits_ssize-t/cbindgen.toml b/src/header/bits_ssize-t/cbindgen.toml
new file mode 100644
index 0000000000..d02adad767
--- /dev/null
+++ b/src/header/bits_ssize-t/cbindgen.toml
@@ -0,0 +1,25 @@
+# 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 ssize_t:
+# - aio.h
+# - dirent.h
+# - monetary.h
+# - mqueue.h
+# - stdio.h
+# - sys/msg.h
+# - sys/socket.h
+# - sys/types.h (where it should be defined)
+# - sys/uio.h
+# - unistd.h
+sys_includes = []
+include_guard = "_RELIBC_BITS_SSIZE_T_H"
+language = "C"
+style = "type"
+no_includes = true
+cpp_compat = true
+[export]
+include = ["ssize_t"]
+[enum]
+prefix_with_name = true
diff --git a/src/header/bits_ssize-t/mod.rs b/src/header/bits_ssize-t/mod.rs
new file mode 100644
index 0000000000..a8b518bf0b
--- /dev/null
+++ b/src/header/bits_ssize-t/mod.rs
@@ -0,0 +1,5 @@
+use crate::platform::types::c_long;
+
+/// Used for a count of bytes or an error indication.
+#[allow(non_camel_case_types)]
+pub type ssize_t = c_long;
diff --git a/src/header/mod.rs b/src/header/mod.rs
index 7f82b7915f..9ef9953492 100644
--- a/src/header/mod.rs
+++ b/src/header/mod.rs
@@ -15,6 +15,8 @@ pub mod bits_safamily_t;
 pub mod bits_sigset_t;
 #[path = "bits_socklen-t/mod.rs"]
 pub mod bits_socklen_t;
+#[path = "bits_ssize-t/mod.rs"]
+pub mod bits_ssize_t;
 #[path = "bits_suseconds-t/mod.rs"]
 pub mod bits_suseconds_t;
 #[path = "bits_time-t/mod.rs"]
diff --git a/src/header/sys_types_internal/cbindgen.toml b/src/header/sys_types_internal/cbindgen.toml
index 41b3d0a724..4e253f3ba4 100644
--- a/src/header/sys_types_internal/cbindgen.toml
+++ b/src/header/sys_types_internal/cbindgen.toml
@@ -1,6 +1,7 @@
 sys_includes = ["stddef.h"]
 # TODO: figure out how to export void* type
 after_includes = """
+#include <bits/ssize-t.h>
 #include <bits/suseconds-t.h>
 #include <bits/time-t.h>
 
@@ -24,7 +25,6 @@ include = [
   "off_t",
   "pid_t",
   "id_t",
-  "ssize_t",
   "useconds_t",
   "clock_t",
   "clockid_t",
diff --git a/src/header/sys_types_internal/mod.rs b/src/header/sys_types_internal/mod.rs
index bd8ab3be9c..56b3fec7a9 100644
--- a/src/header/sys_types_internal/mod.rs
+++ b/src/header/sys_types_internal/mod.rs
@@ -7,7 +7,9 @@
 //! <https://pubs.opengroup.org/onlinepubs/009695399/basedefs/sys/types.h.html>
 //! for the old specification.
 
-pub use crate::header::{bits_suseconds_t::suseconds_t, bits_time_t::time_t};
+pub use crate::header::{
+    bits_ssize_t::ssize_t, bits_suseconds_t::suseconds_t, bits_time_t::time_t,
+};
 use crate::platform::types::{
     c_char, c_int, c_long, c_longlong, c_uchar, c_uint, c_ulong, c_ulonglong, c_ushort,
 };
@@ -38,8 +40,6 @@ pub type off_t = c_longlong;
 pub type pid_t = c_int;
 /// Used as a general identifier; can be used to contain at least a pid_t, uid_t, or gid_t.
 pub type id_t = c_uint;
-/// Used for a count of bytes or an error indication.
-pub type ssize_t = c_long;
 pub type useconds_t = c_uint;
 
 /// Used for system times in clock ticks or CLOCKS_PER_SEC.