diff --git a/crates/eips/src/eip4844/sidecar.rs b/crates/eips/src/eip4844/sidecar.rs
index 9ce3d137bbb..d39b9535dc6 100644
--- a/crates/eips/src/eip4844/sidecar.rs
+++ b/crates/eips/src/eip4844/sidecar.rs
@@ -346,8 +346,8 @@ impl BlobTransactionSidecar {
     /// Decodes the [BlobTransactionSidecar] from RLP bytes.
     pub fn rlp_decode(buf: &mut &[u8]) -> alloy_rlp::Result<Self> {
         let header = Header::decode(buf)?;
-        if header.list {
-            return Err(alloy_rlp::Error::UnexpectedList);
+        if !header.list {
+            return Err(alloy_rlp::Error::UnexpectedString);
         }
         if buf.len() < header.payload_length {
             return Err(alloy_rlp::Error::InputTooShort);