diff --git a/openssl-sys/src/cms.rs b/openssl-sys/src/cms.rs
index f008adb1c..05b99cbf1 100644
--- a/openssl-sys/src/cms.rs
+++ b/openssl-sys/src/cms.rs
@@ -44,3 +44,5 @@ pub const CMS_DEBUG_DECRYPT: c_uint = 0x20000;
 pub const CMS_KEY_PARAM: c_uint = 0x40000;
 #[cfg(ossl110)]
 pub const CMS_ASCIICRLF: c_uint = 0x80000;
+#[cfg(ossl300)]
+pub const CMS_CADES: c_uint = 0x100000;
diff --git a/openssl/src/cms.rs b/openssl/src/cms.rs
index a946230a5..1e1906452 100644
--- a/openssl/src/cms.rs
+++ b/openssl/src/cms.rs
@@ -47,6 +47,8 @@ bitflags! {
         const KEY_PARAM = ffi::CMS_KEY_PARAM;
         #[cfg(all(not(libressl), not(ossl101), not(ossl102)))]
         const ASCIICRLF = ffi::CMS_ASCIICRLF;
+        #[cfg(all(not(libressl), not(ossl101), not(ossl102), not(ossl110), not(ossl110g), not(ossl110h), not(ossl111), not(ossl111d)))]
+        const CADES = ffi::CMS_CADES;
     }
 }