diff --git a/core/core.js b/core/core.js
index a7d30bc..3794540 100644
--- a/core/core.js
+++ b/core/core.js
@@ -383,7 +383,6 @@ var main;(function(){`
     patchedFile = patchedFile.replace(
         ` id="game_frame">`,
         ` id="game_frame">
-    \<script id="1_12_corelib_flag"\>ModAPI.is_1_12 = ${patchedFile.includes("nleit_MainClass_main")}\<\/script\>
     \<script id="modapi_patchesreg_events"\>${assets.PatchesRegistry.getEventInjectorCode()};\<\/script\>
     \<script id="modapi_postinit"\>${assets.modapi_postinit.replace("__modapi_version_code__", EFIConfig.ModAPIVersion)}\<\/script\>
     \<script id="modapi_modloader"\>${assets.modapi_modloader}\<\/script\>
diff --git a/core/postinit.js b/core/postinit.js
index 45b05e3..3dfad8d 100644
--- a/core/postinit.js
+++ b/core/postinit.js
@@ -16,6 +16,7 @@ const modapi_postinit = "(" + (() => {
     }
 
     ModAPI.hooks._classMap = {};
+    ModAPI.is_1_12 = !!ModAPI.hooks.methods.nleit_MainClass_main;
     globalThis.PluginAPI ||= ModAPI;
     ModAPI.mcinstance ||= {};
     ModAPI.javaClient ||= {};