diff --git a/ProjectSettings/ProjectSettings.asset b/ProjectSettings/ProjectSettings.asset
index 72669f1c0..d7bc06424 100644
--- a/ProjectSettings/ProjectSettings.asset
+++ b/ProjectSettings/ProjectSettings.asset
@@ -495,7 +495,7 @@ PlayerSettings:
   webGLLinkerTarget: 1
   webGLThreadsSupport: 0
   scriptingDefineSymbols:
-    1: MIRROR;MIRROR_1726_OR_NEWER;MIRROR_3_0_OR_NEWER;MIRROR_3_12_OR_NEWER
+    1: MIRROR;MIRROR_1726_OR_NEWER;MIRROR_3_0_OR_NEWER;MIRROR_3_12_OR_NEWER;MIRROR_4_0_OR_NEWER
   platformArchitecture: {}
   scriptingBackend: {}
   il2cppCompilerConfiguration: {}