diff --git a/skywalking/trace/span.py b/skywalking/trace/span.py
index 24fa0f28..70c9dcb2 100644
--- a/skywalking/trace/span.py
+++ b/skywalking/trace/span.py
@@ -116,7 +116,7 @@ def __enter__(self):
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        if isinstance(exc_val, BaseException):
+        if isinstance(exc_val, Exception):
             self.raised()
         self.stop()
         if exc_tb is not None: