diff --git a/unsloth/models/_utils.py b/unsloth/models/_utils.py
index 5d6f7921..0b8e381c 100644
--- a/unsloth/models/_utils.py
+++ b/unsloth/models/_utils.py
@@ -197,17 +197,21 @@ def patch_mistral_nemo_config(config):
 
     source = inspect.getsource(transformers.cache_utils.DynamicCache.__getitem__)
     start = source.find("def")
-    spaces = start*" "
     source = source.split("\n")
     source = "\n".join(x[start:] for x in source)
+
     where = source.find("raise KeyError")
-    source = source[:where] + \
-        f"if len(self) == 0:\n{spaces}{spaces}"\
-        "    raise RuntimeError('Unsloth: You must call `FastLanguageModel.for_inference(model)` before doing inference for Unsloth models.')\n" + \
-        f"{spaces}{spaces}else:\n{spaces}{spaces}{spaces}" + source[where:]
+    source = (
+        source[:where] +
+        "if len(self) == 0:\n" +
+        "            raise RuntimeError('Unsloth: You must call `FastLanguageModel.for_inference(model)` before doing inference for Unsloth models.')\n" +
+        "        else:\n" +
+        source[where:]
+    )
     source = source.replace("__getitem__", "__cache_utils_getitem__", 1)
     exec(source)
     transformers.cache_utils.DynamicCache.__getitem__ = __cache_utils_getitem__
+
 pass
 # =============================================