diff --git a/src/transformers/modeling_tf_pytorch_utils.py b/src/transformers/modeling_tf_pytorch_utils.py
index 24bdf4faa06..5b9f38e1bc2 100644
--- a/src/transformers/modeling_tf_pytorch_utils.py
+++ b/src/transformers/modeling_tf_pytorch_utils.py
@@ -78,6 +78,9 @@ def convert_tf_weight_name_to_pt_weight_name(
         tf_name = tf_name[len(name_scope) :]
         tf_name = tf_name.lstrip("/")
     tf_name = tf_name.replace(":0", "")  # device ids
+    if (len(tf_name) > 2048 and "___" in tf_name) or tf_name.count("___") > 10:
+        # ReDOS check
+        raise ValueError("TF variable name is too long or contains too many ___ separators: " + tf_name)
     tf_name = re.sub(
         r"/[^/]*___([^/]*)/", r"/\1/", tf_name
     )  # '$1___$2' is replaced by $2 (can be used to duplicate or remove layers in TF2.0 vs PyTorch)