diff --git a/src/transformers/trainer.py b/src/transformers/trainer.py
index c31fa8fbbddd..cc5d1ee0c366 100755
--- a/src/transformers/trainer.py
+++ b/src/transformers/trainer.py
@@ -742,6 +742,13 @@ def tokenizer(self) -> Optional[PreTrainedTokenizerBase]:
         logger.warning("Trainer.tokenizer is now deprecated. You should use Trainer.processing_class instead.")
         return self.processing_class
 
+    @tokenizer.setter
+    def tokenizer(self, processing_class) -> None:
+        logger.warning(
+            "Trainer.tokenizer is now deprecated. You should use `Trainer.processing_class = processing_class` instead."
+        )
+        self.processing_class = processing_class
+
     def _activate_neftune(self, model):
         r"""
         Activates the neftune as presented in this code: https://github.com/neelsjain/NEFTune and paper: