diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index 996d09f01b7f..a9723bb7927f 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -5307,6 +5307,7 @@ pub const CANFD_MAX_DLEN: usize = 64;
 
 pub const CANFD_BRS: c_int = 0x01;
 pub const CANFD_ESI: c_int = 0x02;
+pub const CANFD_FDF: c_int = 0x04;
 
 pub const CANXL_MIN_DLC: c_int = 0;
 pub const CANXL_MAX_DLC: c_int = 2047;