diff --git a/src/cfdp/pdu/eof.rs b/src/cfdp/pdu/eof.rs
index b6ce0cd..bfe31d4 100644
--- a/src/cfdp/pdu/eof.rs
+++ b/src/cfdp/pdu/eof.rs
@@ -3,7 +3,7 @@ use crate::cfdp::pdu::{
     FileDirectiveType, PduError, PduHeader,
 };
 use crate::cfdp::tlv::EntityIdTlv;
-use crate::cfdp::{ConditionCode, CrcFlag, LargeFileFlag};
+use crate::cfdp::{ConditionCode, CrcFlag, Direction, LargeFileFlag};
 use crate::ByteConversionError;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
@@ -22,7 +22,9 @@ pub struct EofPdu {
 }
 
 impl EofPdu {
-    pub fn new_no_error(pdu_header: PduHeader, file_checksum: u32, file_size: u64) -> Self {
+    pub fn new_no_error(mut pdu_header: PduHeader, file_checksum: u32, file_size: u64) -> Self {
+        // Force correct direction flag.
+        pdu_header.pdu_conf.direction = Direction::TowardsReceiver;
         let mut eof_pdu = Self {
             pdu_header,
             condition_code: ConditionCode::NoError,
diff --git a/src/cfdp/pdu/finished.rs b/src/cfdp/pdu/finished.rs
index 0ee526c..9732863 100644
--- a/src/cfdp/pdu/finished.rs
+++ b/src/cfdp/pdu/finished.rs
@@ -2,7 +2,7 @@ use crate::cfdp::pdu::{
     add_pdu_crc, generic_length_checks_pdu_deserialization, FileDirectiveType, PduError, PduHeader,
 };
 use crate::cfdp::tlv::{EntityIdTlv, Tlv, TlvType, TlvTypeField};
-use crate::cfdp::{ConditionCode, CrcFlag, PduType, TlvLvError};
+use crate::cfdp::{ConditionCode, CrcFlag, Direction, PduType, TlvLvError};
 use crate::ByteConversionError;
 use num_enum::{IntoPrimitive, TryFromPrimitive};
 #[cfg(feature = "serde")]
@@ -83,6 +83,8 @@ impl<'fs_responses> FinishedPdu<'fs_responses> {
         fault_location: Option<EntityIdTlv>,
     ) -> Self {
         pdu_header.pdu_type = PduType::FileDirective;
+        // Enforce correct direction bit.
+        pdu_header.pdu_conf.direction = Direction::TowardsSender;
         let mut finished_pdu = Self {
             pdu_header,
             condition_code,
@@ -249,7 +251,7 @@ mod tests {
     use crate::cfdp::pdu::finished::{DeliveryCode, FileStatus, FinishedPdu};
     use crate::cfdp::pdu::tests::{common_pdu_conf, verify_raw_header};
     use crate::cfdp::pdu::{FileDirectiveType, PduHeader};
-    use crate::cfdp::{ConditionCode, CrcFlag, LargeFileFlag};
+    use crate::cfdp::{ConditionCode, CrcFlag, Direction, LargeFileFlag};
 
     fn generic_finished_pdu(
         crc_flag: CrcFlag,
@@ -270,6 +272,10 @@ mod tests {
             FileStatus::Retained,
         );
         assert_eq!(finished_pdu.condition_code(), ConditionCode::NoError);
+        assert_eq!(
+            finished_pdu.pdu_header().pdu_conf.direction,
+            Direction::TowardsSender
+        );
         assert_eq!(finished_pdu.delivery_code(), DeliveryCode::Complete);
         assert_eq!(finished_pdu.file_status(), FileStatus::Retained);
         assert_eq!(finished_pdu.filestore_responses(), None);
@@ -290,6 +296,10 @@ mod tests {
         let written = written.unwrap();
         assert_eq!(written, finished_pdu.written_len());
         assert_eq!(written, finished_pdu.pdu_header().header_len() + 2);
+        assert_eq!(
+            finished_pdu.pdu_header().pdu_conf.direction,
+            Direction::TowardsSender
+        );
         verify_raw_header(finished_pdu.pdu_header(), &buf);
         let mut current_idx = finished_pdu.pdu_header().header_len();
         assert_eq!(buf[current_idx], FileDirectiveType::FinishedPdu as u8);
diff --git a/src/cfdp/pdu/metadata.rs b/src/cfdp/pdu/metadata.rs
index 06a6a51..a90bb45 100644
--- a/src/cfdp/pdu/metadata.rs
+++ b/src/cfdp/pdu/metadata.rs
@@ -4,7 +4,7 @@ use crate::cfdp::pdu::{
     FileDirectiveType, PduError, PduHeader,
 };
 use crate::cfdp::tlv::Tlv;
-use crate::cfdp::{ChecksumType, CrcFlag, LargeFileFlag, PduType};
+use crate::cfdp::{ChecksumType, CrcFlag, Direction, LargeFileFlag, PduType};
 use crate::ByteConversionError;
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
@@ -134,6 +134,7 @@ impl<'src_name, 'dest_name, 'opts> MetadataPdu<'src_name, 'dest_name, 'opts> {
         options: Option<&'opts [u8]>,
     ) -> Self {
         pdu_header.pdu_type = PduType::FileDirective;
+        pdu_header.pdu_conf.direction = Direction::TowardsReceiver;
         let mut pdu = Self {
             pdu_header,
             metadata_params,
diff --git a/src/cfdp/pdu/mod.rs b/src/cfdp/pdu/mod.rs
index 65834e0..669ff5f 100644
--- a/src/cfdp/pdu/mod.rs
+++ b/src/cfdp/pdu/mod.rs
@@ -632,7 +632,6 @@ mod tests {
         assert_eq!((buf[0] >> 5) & 0b111, CFDP_VERSION_2);
         // File directive
         assert_eq!((buf[0] >> 4) & 1, pdu_conf.pdu_type as u8);
-        // Towards receiver
         assert_eq!((buf[0] >> 3) & 1, pdu_conf.pdu_conf.direction as u8);
         // Acknowledged
         assert_eq!((buf[0] >> 2) & 1, pdu_conf.pdu_conf.trans_mode as u8);
@@ -678,7 +677,7 @@ mod tests {
                             .try_into()
                             .unwrap()
                     ),
-                    ubf.value() as u64
+                    ubf.value()
                 ),
                 _ => panic!("invalid entity ID length"),
             }