1 files changed, 3 insertions, 0 deletions
diff --git a/ruby.c b/ruby.c
index 3eab16af21..46bfc7be1f 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1824,6 +1824,9 @@ ruby_opt_init(ruby_cmdline_options_t *opt)
 
     ruby_init_prelude();
 
+    if (rb_namespace_available())
+        rb_initialize_main_namespace();
+
     // Initialize JITs after prelude because JITing prelude is typically not optimal.
 #if USE_YJIT
     rb_yjit_init(opt->yjit);