diff --git a/lldb/scripts/Python/python-wrapper.swig b/lldb/scripts/Python/python-wrapper.swig
index d28f0cda110e..75b082ffe0c4 100644
--- a/lldb/scripts/Python/python-wrapper.swig
+++ b/lldb/scripts/Python/python-wrapper.swig
@@ -135,6 +135,7 @@ public:
         {
             if (!arg)
                 return retval;
+            Py_INCREF(arg); // _SetItem steals a reference
             PyTuple_SetItem(pargs,idx,arg);
             idx++;
         }