diff --git a/flydra-feature-detector/src/lib.rs b/flydra-feature-detector/src/lib.rs
index e38e99679..6d8634c3f 100644
--- a/flydra-feature-detector/src/lib.rs
+++ b/flydra-feature-detector/src/lib.rs
@@ -417,7 +417,6 @@ pub struct FlydraFeatureDetector {
     last_sent_raw_image_time: std::time::Instant,
     mask_image: Option<FastImageData<Chan1, u8>>,
     background_update_state: BackgroundAcquisitionState, // command from UI "take a new bg image"
-    frame_offset: Option<u64>,
     acquisition_histogram: AcquisitionHistogram,
     acquisition_duration_allowed_imprecision_msec: Option<f64>,
 
@@ -546,7 +545,6 @@ impl FlydraFeatureDetector {
         w: u32,
         h: u32,
         cfg: ImPtDetectCfg,
-        frame_offset: Option<u64>,
         transmit_feature_detect_settings_tx: Option<
             mpsc::Sender<flydra_feature_detector_types::ImPtDetectCfg>,
         >,
@@ -562,7 +560,6 @@ impl FlydraFeatureDetector {
             mask_image: None,
             last_sent_raw_image_time: std::time::Instant::now(),
             background_update_state: BackgroundAcquisitionState::Initialization,
-            frame_offset,
             acquisition_histogram,
             acquisition_duration_allowed_imprecision_msec,
             transmit_feature_detect_settings_tx,
@@ -593,11 +590,6 @@ impl FlydraFeatureDetector {
         Ok(())
     }
 
-    pub fn set_frame_offset(&mut self, value: u64) {
-        debug!("set_frame_offset");
-        self.frame_offset = Some(value);
-    }
-
     // command from UI to say "take a new bg image"
     pub fn do_take_current_image_as_background(&mut self) -> Result<()> {
         debug!("taking bg image in camera");
diff --git a/flydra-feature-detector/tests/test-fmf-tracking.rs b/flydra-feature-detector/tests/test-fmf-tracking.rs
index b841f6e64..a1ace23bb 100644
--- a/flydra-feature-detector/tests/test-fmf-tracking.rs
+++ b/flydra-feature-detector/tests/test-fmf-tracking.rs
@@ -18,14 +18,11 @@ async fn track_fmf() -> anyhow::Result<()> {
 
     let cfg = flydra_pt_detect_cfg::default_absdiff();
 
-    let frame_offset = None;
-
     let mut ft = FlydraFeatureDetector::new(
         &flydra_types::RawCamName::new("fmf".to_string()),
         reader.width(),
         reader.height(),
         cfg,
-        frame_offset,
         None,
         None,
     )?;
diff --git a/flydra-feature-detector/tests/test-small.rs b/flydra-feature-detector/tests/test-small.rs
index e9f490ddc..9c6a4f4f6 100644
--- a/flydra-feature-detector/tests/test-small.rs
+++ b/flydra-feature-detector/tests/test-small.rs
@@ -17,14 +17,11 @@ async fn track_small() -> anyhow::Result<()> {
 
     let cfg = flydra_pt_detect_cfg::default_absdiff();
 
-    let frame_offset = None;
-
     let mut ft = FlydraFeatureDetector::new(
         &flydra_types::RawCamName::new("small-test-image".to_string()),
         W,
         H,
         cfg,
-        frame_offset,
         None,
         None,
     )?;
@@ -52,14 +49,11 @@ async fn track_moving_stride() -> anyhow::Result<()> {
 
     let cfg = flydra_pt_detect_cfg::default_absdiff();
 
-    let frame_offset = None;
-
     let mut ft = FlydraFeatureDetector::new(
         &flydra_types::RawCamName::new("moving".to_string()),
         W,
         H,
         cfg,
-        frame_offset,
         None,
         None,
     )?;
diff --git a/strand-cam/src/frame_process_task.rs b/strand-cam/src/frame_process_task.rs
index 087359cee..4df90ac5f 100644
--- a/strand-cam/src/frame_process_task.rs
+++ b/strand-cam/src/frame_process_task.rs
@@ -110,14 +110,6 @@ pub(crate) async fn frame_process_task<'a>(
     #[allow(unused_assignments)]
     let mut is_doing_object_detection = is_braid;
 
-    #[cfg(feature = "flydra_feat_detect")]
-    let frame_offset = if is_braid {
-        // We start initially unsynchronized. We wait for synchronizaton.
-        None
-    } else {
-        Some(0)
-    };
-
     let transmit_feature_detect_settings_tx = if is_braid {
         let (transmit_feature_detect_settings_tx, transmit_feature_detect_settings_rx) =
             tokio::sync::mpsc::channel::<ImPtDetectCfg>(10);
@@ -157,7 +149,6 @@ pub(crate) async fn frame_process_task<'a>(
         width,
         height,
         im_pt_detect_cfg.clone(),
-        frame_offset,
         transmit_feature_detect_settings_tx,
         acquisition_duration_allowed_imprecision_msec,
     )?;
@@ -1463,10 +1454,6 @@ pub(crate) async fn frame_process_task<'a>(
             }
             Msg::SetFrameOffset(fo) => {
                 opt_frame_offset = Some(fo);
-                #[cfg(feature = "flydra_feat_detect")]
-                {
-                    im_tracker.set_frame_offset(fo);
-                }
             }
             Msg::SetTriggerboxClockModel(cm) => {
                 triggerbox_clock_model = cm;