diff --git a/debug/accuracy_tools/msprobe/core/common/utils.py b/debug/accuracy_tools/msprobe/core/common/utils.py
index 50ad9e84c7dbd61b50d8faf70993953bba6ef73a..88e37958e8cdf80dfd150969669e1dd7aeac3d67 100644
--- a/debug/accuracy_tools/msprobe/core/common/utils.py
+++ b/debug/accuracy_tools/msprobe/core/common/utils.py
@@ -447,6 +447,7 @@ def recursion_depth_decorator(func_info):
         @wraps(func)
         def wrapper(*args, **kwargs):
             func_id = id(func)
+            global recursion_depth
             recursion_depth[func_id] += 1
             if recursion_depth[func_id] > Const.MAX_DEPTH:
                 msg = f"call {func_info} exceeds the recursion limit."