diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
index d72648a35d0..ef74f61e043 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi
@@ -149,6 +149,6 @@ cdef class Server:
       grpc_server_destroy(self.c_server)
       self.c_server = NULL
 
-  def __dealloc(self):
+  def __dealloc__(self):
     if self.c_server == NULL:
       grpc_shutdown()