--- src/ruby/ext/grpc/rb_channel.c.orig	2023-05-20 19:48:13 UTC

+++ src/ruby/ext/grpc/rb_channel.c

@@ -694,7 +694,7 @@ static void run_poll_channels_loop_unblocking_func(voi

 }

 // Poll channel connectivity states in background thread without the GIL.

-static VALUE run_poll_channels_loop(VALUE arg) {

+static VALUE run_poll_channels_loop(void *arg) {

   (void)arg;

   gpr_log(

       GPR_DEBUG,

--- src/ruby/ext/grpc/rb_event_thread.c.orig	2023-05-20 19:51:52 UTC

+++ src/ruby/ext/grpc/rb_event_thread.c

@@ -114,7 +114,7 @@ static void grpc_rb_event_unblocking_func(void* arg) {

 /* This is the implementation of the thread that handles auth metadata plugin

  * events */

-static VALUE grpc_rb_event_thread(VALUE arg) {

+static VALUE grpc_rb_event_thread(void *arg) {

   grpc_rb_event* event;

   (void)arg;

   grpc_ruby_init();