diff --git a/Userland/Libraries/LibJS/Runtime/Reference.h b/Userland/Libraries/LibJS/Runtime/Reference.h
index 5c25181d6b..d2df5e06b8 100644
--- a/Userland/Libraries/LibJS/Runtime/Reference.h
+++ b/Userland/Libraries/LibJS/Runtime/Reference.h
@@ -108,7 +108,7 @@ private:
 
     BaseType m_base_type { BaseType::Unresolvable };
     union {
-        Value m_base_value;
+        Value m_base_value {};
         EnvironmentRecord* m_base_environment_record;
     };
     PropertyName m_name;