diff --git a/libs/fuzzlib/tools/run_result.py b/libs/fuzzlib/tools/run_result.py
index 4da38aeb03103c525dfc9429cd918edbfdc896c5..8c2490b2e72ae7a23402053a94b4f10c253c02d6 100644
--- a/libs/fuzzlib/tools/run_result.py
+++ b/libs/fuzzlib/tools/run_result.py
@@ -80,7 +80,7 @@ class RunResult():
         pass
 
     def write_analysis_result(self, analysis_ressult_path, html_format=True):
-        is os.path.exists(analysis_ressult_path):
+        if os.path.exists(analysis_ressult_path):
             os.remove(analysis_ressult_path)
         with os.fdopen(os.open(analysis_ressult_path, FLAGS, MODES), 'wb') as f:
             if html_format: