diff --git a/Assets/YooAsset/Editor/AssetBundleBuilder/BuildTasks/TaskPrepare.cs b/Assets/YooAsset/Editor/AssetBundleBuilder/BuildTasks/TaskPrepare.cs
index 297620c..5f839fd 100644
--- a/Assets/YooAsset/Editor/AssetBundleBuilder/BuildTasks/TaskPrepare.cs
+++ b/Assets/YooAsset/Editor/AssetBundleBuilder/BuildTasks/TaskPrepare.cs
@@ -16,7 +16,7 @@ namespace YooAsset.Editor
 
 			var buildParameters = buildParametersContext.Parameters;
 
-#if !UNITY_2021_1_OR_NEWER
+#if UNITY_2021_1_OR_NEWER
 			if (buildParameters.BuildPipeline == EBuildPipeline.BuiltinBuildPipeline)
 				throw new Exception($"Unity2021 or newer not support {nameof(EBuildPipeline.BuiltinBuildPipeline)}, Please use {nameof(EBuildPipeline.ScriptableBuildPipeline)}");
 #endif