diff --git a/src/flask_debugtoolbar/panels/profiler.py b/src/flask_debugtoolbar/panels/profiler.py
index 749edce..6528241 100644
--- a/src/flask_debugtoolbar/panels/profiler.py
+++ b/src/flask_debugtoolbar/panels/profiler.py
@@ -36,6 +36,8 @@ def __init__(
     ) -> None:
         super().__init__(jinja_env, context=context)
 
+        self.dump_filename = None
+
         if current_app.config.get("DEBUG_TB_PROFILER_ENABLED"):
             self.is_active = True
             self.dump_filename = current_app.config.get(