diff --git a/Lib/bdb.py b/Lib/bdb.py
index c6a10359ac..ba17f14c03 100644
--- a/Lib/bdb.py
+++ b/Lib/bdb.py
@@ -89,7 +89,10 @@ class Bdb:
         if event == 'call':
             return self.dispatch_call(frame, arg)
         if event == 'return':
-            return self.dispatch_return(frame, arg)
+            res = self.dispatch_return(frame, arg)
+            if frame == self.botframe:
+                self.botframe = None
+            return res
         if event == 'exception':
             return self.dispatch_exception(frame, arg)
         if event == 'c_call':