diff --git a/python/google/protobuf/pyext/descriptor.cc b/python/google/protobuf/pyext/descriptor.cc
index 91fe832b95..323a8d3ad1 100644
--- a/python/google/protobuf/pyext/descriptor.cc
+++ b/python/google/protobuf/pyext/descriptor.cc
@@ -1508,6 +1508,11 @@ static int SetHasOptions(PyFileDescriptor *self, PyObject *value,
 }
 
 static PyObject* GetDebugString(PyFileDescriptor* self) {
+  PyErr_Warn(nullptr,
+             "GetDebugString() API is deprecated. This API only "
+             "exists in protobuf c++ and does not exists in pure python, upb "
+             "or any other languages. GetDebugString() for python cpp "
+             "extension will be removed in Jan 2025");
   return PyString_FromCppString(_GetDescriptor(self)->DebugString());
 }