diff --git a/src/google/adk/evaluation/agent_evaluator.py b/src/google/adk/evaluation/agent_evaluator.py
index 6ee001f9d..fceaa0934 100644
--- a/src/google/adk/evaluation/agent_evaluator.py
+++ b/src/google/adk/evaluation/agent_evaluator.py
@@ -230,7 +230,7 @@ def _load_eval_set_from_file(
       try:
         eval_set = EvalSet.model_validate_json(content)
         assert len(initial_session) == 0, (
-            "Intial session should be specified as a part of EvalSet file."
+            "Initial session should be specified as a part of EvalSet file."
             " Explicit initial session is only needed, when specifying data in"
             " the older schema."
         )