diff --git a/src/lib.rs b/src/lib.rs
index b8ce2e2a..d446313c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -800,7 +800,7 @@ where
         };
 
         let bcd_header = BcdHeader {
-            flags: 0x20,
+            flags: BDC_VERSION << BDC_VERSION_SHIFT,
             priority: 0,
             flags2: 0,
             data_offset: 0,
diff --git a/src/structs.rs b/src/structs.rs
index ed5fc18d..6d4525a4 100644
--- a/src/structs.rs
+++ b/src/structs.rs
@@ -53,6 +53,9 @@ pub struct CdcHeader {
 }
 impl_bytes!(CdcHeader);
 
+pub const BDC_VERSION: u8 = 2;
+pub const BDC_VERSION_SHIFT: u8 = 4;
+
 #[derive(Clone, Copy)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(C)]