diff --git a/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h b/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h
index cb36b045..598230cd 100644
--- a/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h
+++ b/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h
@@ -19,6 +19,7 @@ namespace IW4
         static constexpr int ZONE_VERSION_PC = 276;
         static constexpr int ZONE_VERSION_IW4x = 3;
         static constexpr int ZONE_VERSION_XENON = 269;
+        static constexpr int ZONE_VERSION_XENON_ALPHA = 253;
 
         static_assert(std::char_traits<char>::length(MAGIC_SIGNED_INFINITY_WARD) == sizeof(ZoneHeader::m_magic));
         static_assert(std::char_traits<char>::length(MAGIC_SIGNED_OAT) == sizeof(ZoneHeader::m_magic));
diff --git a/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp b/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp
index 14d46ef4..8a48a880 100644
--- a/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp
+++ b/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp
@@ -106,7 +106,8 @@ namespace
                 };
             }
         }
-        else if (endianness::FromBigEndian(header.m_version) == ZoneConstants::ZONE_VERSION_XENON)
+        else if (endianness::FromBigEndian(header.m_version) == ZoneConstants::ZONE_VERSION_XENON
+                 || endianness::FromBigEndian(header.m_version) == ZoneConstants::ZONE_VERSION_XENON_ALPHA)
         {
             if (!memcmp(header.m_magic, ZoneConstants::MAGIC_UNSIGNED, std::char_traits<char>::length(ZoneConstants::MAGIC_UNSIGNED)))
             {