diff --git a/src/vak/eval/frame_classification.py b/src/vak/eval/frame_classification.py
index 1be124758..9757287e8 100644
--- a/src/vak/eval/frame_classification.py
+++ b/src/vak/eval/frame_classification.py
@@ -140,7 +140,7 @@ def eval_frame_classification_model(
         raise KeyError(
             f"The `dataset_config` for frame classification model '{model_name}' must include a 'params' sub-table "
             f"that sets a value for 'window_size', but received a `dataset_config` that did not:\n{dataset_config}"
-        )
+        ) from e
     transform_params = {
         "spect_standardizer": spect_standardizer,
         "window_size": window_size,
diff --git a/src/vak/predict/frame_classification.py b/src/vak/predict/frame_classification.py
index d65924490..765fb3134 100644
--- a/src/vak/predict/frame_classification.py
+++ b/src/vak/predict/frame_classification.py
@@ -145,7 +145,7 @@ def predict_with_frame_classification_model(
         raise KeyError(
             f"The `dataset_config` for frame classification model '{model_name}' must include a 'params' sub-table "
             f"that sets a value for 'window_size', but received a `dataset_config` that did not:\n{dataset_config}"
-        )
+        ) from e
     transform_params = {
         "spect_standardizer": spect_standardizer,
         "window_size": window_size,
diff --git a/src/vak/train/frame_classification.py b/src/vak/train/frame_classification.py
index da9a13c54..25e07a062 100644
--- a/src/vak/train/frame_classification.py
+++ b/src/vak/train/frame_classification.py
@@ -219,7 +219,7 @@ def train_frame_classification_model(
         raise KeyError(
             f"The `dataset_config` for frame classification model '{model_name}' must include a 'params' sub-table "
             f"that sets a value for 'window_size', but received a `dataset_config` that did not:\n{dataset_config}"
-        )
+        ) from e
     transform_kwargs = {
         "spect_standardizer": spect_standardizer,
         "window_size": window_size,