diff --git a/egs/librispeech/ASR/pruned_transducer_stateless7/train.py b/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
index 17b4f9c4b..1fd059b79 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
@@ -79,6 +79,7 @@ from icefall.checkpoint import (
     save_checkpoint_with_global_batch_idx,
     update_averaged_model,
 )
+from icefall.hooks import register_inf_check_hooks
 from icefall.dist import cleanup_dist, setup_dist
 from icefall.env import get_env_info
 from icefall.utils import AttributeDict, MetricsTracker, setup_logger, str2bool
@@ -308,6 +309,13 @@ def get_parser():
         help="Accumulate stats on activations, print them and exit.",
     )
 
+    parser.add_argument(
+        "--inf-check",
+        type=str2bool,
+        default=False,
+        help="Add hooks to check for infinite module outputs and gradients.",
+    )
+
     parser.add_argument(
         "--save-every-n",
         type=int,
@@ -992,6 +1000,9 @@ def run(rank, world_size, args):
         )  # allow 4 megabytes per sub-module
         diagnostic = diagnostics.attach_diagnostics(model, opts)
 
+    if params.inf_check:
+        register_inf_check_hooks(model)
+
     librispeech = LibriSpeechAsrDataModule(args)
 
     train_cuts = librispeech.train_clean_100_cuts()