diff --git a/openssl-sys/src/handwritten/cmac.rs b/openssl-sys/src/handwritten/cmac.rs
new file mode 100644
index 0000000000000000000000000000000000000000..e44094d21a6966f399e6d49d695afb322db8c08c
--- /dev/null
+++ b/openssl-sys/src/handwritten/cmac.rs
@@ -0,0 +1,18 @@
+use libc::*;
+
+use super::super::*;
+
+extern "C" {
+    pub fn CMAC_CTX_new() -> *mut CMAC_CTX;
+    pub fn CMAC_CTX_free(ctx: *mut CMAC_CTX);
+    pub fn CMAC_Init(
+        ctx: *mut CMAC_CTX,
+        key: *const c_void,
+        len: size_t,
+        cipher: *const EVP_CIPHER,
+        impl_: *mut ENGINE,
+    ) -> c_int;
+    pub fn CMAC_Update(ctx: *mut CMAC_CTX, data: *const c_void, len: size_t) -> c_int;
+    pub fn CMAC_Final(ctx: *mut CMAC_CTX, out: *mut c_uchar, len: *mut size_t) -> c_int;
+    pub fn CMAC_CTX_copy(dst: *mut CMAC_CTX, src: *const CMAC_CTX) -> c_int;
+}
diff --git a/openssl-sys/src/handwritten/mod.rs b/openssl-sys/src/handwritten/mod.rs
index 28aa4aecd08661ae1a325de4f1f1952abf8f5c13..9c0f84450119e60f45985babd18aa0462890f446 100644
--- a/openssl-sys/src/handwritten/mod.rs
+++ b/openssl-sys/src/handwritten/mod.rs
@@ -2,6 +2,7 @@ pub use self::aes::*;
 pub use self::asn1::*;
 pub use self::bio::*;
 pub use self::bn::*;
+pub use self::cmac::*;
 pub use self::cms::*;
 pub use self::conf::*;
 pub use self::crypto::*;
@@ -35,6 +36,7 @@ mod aes;
 mod asn1;
 mod bio;
 mod bn;
+mod cmac;
 mod cms;
 mod conf;
 mod crypto;
diff --git a/openssl-sys/src/handwritten/types.rs b/openssl-sys/src/handwritten/types.rs
index 84724f35ef9c530caec953e1bc9612a0c8d7dc6a..06354728f2228c65667f7c33f1e53356cd8a7e79 100644
--- a/openssl-sys/src/handwritten/types.rs
+++ b/openssl-sys/src/handwritten/types.rs
@@ -125,6 +125,8 @@ pub enum EVP_PKEY_ASN1_METHOD {}
 
 pub enum EVP_PKEY_CTX {}
 
+pub enum CMAC_CTX {}
+
 cfg_if! {
     if #[cfg(any(ossl110, libressl280))] {
         pub enum HMAC_CTX {}
diff --git a/systest/build.rs b/systest/build.rs
index 2efcdfe1bf39fb33d688a8de9e0e274e966d3d3f..6d3ac3a3d381a9fdc2189e73fc5bab8790e40a9e 100644
--- a/systest/build.rs
+++ b/systest/build.rs
@@ -56,6 +56,7 @@ fn main() {
         .header("openssl/bio.h")
         .header("openssl/x509v3.h")
         .header("openssl/safestack.h")
+        .header("openssl/cmac.h")
         .header("openssl/hmac.h")
         .header("openssl/obj_mac.h")
         .header("openssl/ssl.h")