diff --git a/ruby.c b/ruby.c
index 22cfeace1e..d722489aca 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1842,10 +1842,12 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt)
     }
 #endif
     if (opt->features.set & FEATURE_BIT(yjit)) {
+#if USE_MJIT
         if (opt->mjit.on) {
             rb_warn("MJIT and YJIT cannot both be enabled at the same time. Exiting");
             exit(1);
         }
+#endif
         rb_yjit_init(&opt->yjit);
     }
     if (opt->dump & (DUMP_BIT(version) | DUMP_BIT(version_v))) {