diff --git a/gc.c b/gc.c
index 0afba4f22c52a0..4fbd74afb820a3 100644
--- a/gc.c
+++ b/gc.c
@@ -5435,6 +5435,7 @@ rb_obj_info_dump_loc(VALUE obj, const char *file, int line, const char *func)
     fprintf(stderr, "<OBJ_INFO:%s@%s:%d> %s\n", func, file, line, rb_raw_obj_info(buff, 0x100, obj));
 }
 
+RBIMPL_ATTR_NOINLINE()
 void
 rb_gc_before_fork(void)
 {
diff --git a/gc/default/default.c b/gc/default/default.c
index 6c2b13c9f37d0b..d5a1525b66f374 100644
--- a/gc/default/default.c
+++ b/gc/default/default.c
@@ -9407,6 +9407,8 @@ rb_gc_impl_before_fork(void *objspace_ptr)
 {
     rb_objspace_t *objspace = objspace_ptr;
 
+    gc_rest(objspace);
+
     objspace->fork_vm_lock_lev = RB_GC_VM_LOCK();
     rb_gc_vm_barrier();
 }