diff --git a/rust/src/smb/smb1_records.rs b/rust/src/smb/smb1_records.rs
index 4ba8a6a06e..c5ca183621 100644
--- a/rust/src/smb/smb1_records.rs
+++ b/rust/src/smb/smb1_records.rs
@@ -198,10 +198,12 @@ pub struct Smb1NegotiateProtocolRecord<'a> {
 
 pub fn parse_smb1_negotiate_protocol_record(i: &[u8])
     -> IResult<&[u8], Smb1NegotiateProtocolRecord<'_>> {
-    let (i, _wtc) = le_u8(i)?;
-    let (i, _bcc) = le_u16(i)?;
+    let (i, _wct) = le_u8(i)?;
+    let (i, bcc) = le_u16(i)?;
     // dialects is a list of [1 byte buffer format][string][0 terminator]
-    let (i, dialects) = many1(complete(take_until_and_consume(b"\0")))(i)?;
+    // honour ByteCount to avoid unbounded allocation
+    let (i, payload) = take(bcc as usize)(i)?;
+    let (_, dialects) = many1(complete(take_until_and_consume(b"\0")))(payload)?;
     let record = Smb1NegotiateProtocolRecord { dialects };
     Ok((i, record))
 }