diff --git a/ruby.c b/ruby.c
index 9541fce9b8..ddfb1476d6 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1455,7 +1455,8 @@ proc_long_options(ruby_cmdline_options_t *opt, const char *s, long argc, char **
     }
     else if (is_option_with_optarg("zjit", '-', true, false, false)) {
         FEATURE_SET(opt->features, FEATURE_BIT(yjit));
-        // TODO
+        extern bool rb_zjit_parse_option();
+        rb_zjit_parse_option();
     }
     else if (strcmp("yydebug", s) == 0) {
         if (envopt) goto noenvopt_long;
diff --git a/zjit/src/lib.rs b/zjit/src/lib.rs
index 4cd4f8a25e..99a6982c73 100644
--- a/zjit/src/lib.rs
+++ b/zjit/src/lib.rs
@@ -10,5 +10,6 @@ extern "C" fn zjit_init() {
 
 #[no_mangle]
 pub extern "C" fn rb_zjit_parse_option() -> bool {
+    println!("parsing zjit");
     false
 }