diff --git a/src/crewai/task.py b/src/crewai/task.py
index 58d44d2df..a098275be 100644
--- a/src/crewai/task.py
+++ b/src/crewai/task.py
@@ -283,7 +283,7 @@ class Task(BaseModel):
             # Ensure result is not None before assignment
             if guardrail_result.result is None:
                 raise Exception(
-                    f"Task guardrail returned None as result. This is not allowed."
+                    "Task guardrail returned None as result. This is not allowed."
                 )
             result = guardrail_result.result