diff --git a/src/bun.js/bindings/ZigGlobalObject.cpp b/src/bun.js/bindings/ZigGlobalObject.cpp
index b7fc91c51f..bb1a727675 100644
--- a/src/bun.js/bindings/ZigGlobalObject.cpp
+++ b/src/bun.js/bindings/ZigGlobalObject.cpp
@@ -189,6 +189,7 @@ extern "C" void JSCInitialize()
         JSC::Options::useJIT() = true;
         JSC::Options::useBBQJIT() = true;
         JSC::Options::useJITCage() = false;
+        JSC::Options::useShadowRealm() = true;
         JSC::Options::ensureOptionsAreCoherent();
     }
 }