diff --git a/gguf-py/gguf/gguf_writer.py b/gguf-py/gguf/gguf_writer.py
index 662dda3cf4..57f9fd1a52 100644
--- a/gguf-py/gguf/gguf_writer.py
+++ b/gguf-py/gguf/gguf_writer.py
@@ -425,8 +425,7 @@ class GGUFWriter:
         fout = self.fout[file_id]
 
         # pop the first tensor info
-        # TODO: cleaner way to get the first key
-        first_tensor_name = [name for name, _ in zip(self.tensors[file_id].keys(), range(1))][0]
+        first_tensor_name = next(iter(self.tensors[file_id]))
         ti = self.tensors[file_id].pop(first_tensor_name)
         assert ti.nbytes == tensor.nbytes